The properties of starch are that they are colorless and tasteless in nature and are the source of carbohydrates in our diet.
Starch are insoluble in cold water, alcohol, and other solvents.
Starch is composed of long chains of sugar molecules which are linked together linked together forming bonds and linkages. The most basic type of starch is amylose it is a linear polymer and another example is amylopectin which is a branching polymer.
Starch is the storage part in a plant where they store the excess energy in the form of glucose. This glucose is an important part of human diet and it provides energy as taken in the form of sugar.
Amylase is a starch-breaking enzyme found in saliva and the pancreas the first step in the digestion process is the breaking down of starch by enzymes.
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If sodium (na) has 4 neutrons, 3 protons, and 2 electrons, which would be the correct ion symbol? responses.
If sodium has 4 neutrons, 3 protons, and 2 electrons, the correct symbol for the ion is: Na⁺.
How to determine the symbol of sodium ion?To write the symbol for sodium ion, we need to examine the number of neutrons, protons, and electrons it has. Generally, a neutral atom has the same number of protons and electrons. It also has the same number of neutrons and protons. This sodium has 3 protons and 2 electrons. Therefore, this ion needs 1 more electron to reach neutrality. Hence, the total charge for the ion is +1 and the correct symbol is Na⁺.
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What is the chemical reaction for melting?
Ice melting is a physical transformation rather than a chemical reaction. The addition of heat energy causes the phase of ice to transition from solid to liquid during melting. However, there is no chemical reaction taking place while it is melting, therefore the molecular composition remains unchanged.
What happens when something melts?Endothermic Reaction: An endothermic process is one in which additional heat is needed to complete the reaction. Ice melting is an example.
What is the name of the melting process?A physical process called melting or fusing causes a substance to change its phase from a solid to a liquid. This happens when the solid's internal energy rises, usually as a result of the application of heat or pressure raises the material's temperature to the point of melting.
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list the ions that exist in each of these solutions HCl, NaOH, CuSO4
H+ and Cl
Na+ and OH
Cu+ and SO4
Nucleotide
Phosphate
Hydrogen Bond
Deoxyribose
Nucleotide identifies the part of the DNA segment labeled as X in the given image.
What is Nucleotides?Nucleotides are organic compounds composed of phosphate and a nucleoside and are nitrogen containing base.
They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.They consists of nitrogen containing base such as :adenine guanine thymineand cytosine in DNA RNA:RNA is often single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternating phosphate groups and the sugar ribose.
They similarly Consists of the following in RNA :
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in the synthesis of prussian blue paint, which compound was mixed with the pigment? calcium calcium carbonate oxygen nitric acid
In order to make Prussian blue paint, a variety of compounds must be mixed together. The pigment itself is made up of iron and potassium ferrocyanide. To this, calcium carbonate, oxygen, and nitric acid are added.
Calcium carbonate is a mineral that is commonly found in limestone and marble. It is also used in a variety of other products such as antacids and toothpaste. In the synthesis of Prussian blue paint, calcium carbonate is used to neutralize the nitric acid. This helps to create the desired color and also prevents the paint from being too acidic.
Oxygen is also added to the mix. Oxygen helps to accelerate the reaction between the iron and potassium ferrocyanide in order to create the desired color. It also helps to make the paint more durable and resistant to fading.
Finally, nitric acid is added to the pigment. Nitric acid helps to create the intense blue color of Prussian blue paint. It also helps to make the paint more resistant to light and water.
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Which substances were ionic?
a. oil
b. corn starch
c. sodium chloride
d. sodium bicarbonate
how good were your predictions in the warm-up?
When 20 grams of potassium chlorate KCl * O _{ 3 is dissolved in 100 grams of water at 80 degrees * C the solution can be correctly described as?
The solution can be described as a supersaturated solution.
What is potassium chlorate?Potassium chlorate is an inorganic compound composed of potassium, chlorine and oxygen. It is an oxidizing agent and a white crystalline solid at room temperature. It is used as a bleaching agent, in fireworks, matches, explosives, and fertilizers. It is also used to make chloric acid and in the production of paper, dyes, and textiles. Potassium chlorate is highly reactive and can be hazardous if not used properly. It is important to use personal protective equipment when handling it.
This means that the solution contains more of the dissolved compound than it can normally hold at the given temperature. In this case, the water is holding more potassium chlorate than it would normally be able to hold at the given temperature. As the temperature increases, the solubility of a substance increases, allowing more potassium chlorate to be dissolved.
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27) The opposite process of freezing is: 27) A) sublimation. B) condensation. C) evaporation. D) boiling. E) none of the above
The opposite process of freezing is-Boiling
Boiling is the quick evaporation of a fluid that occurs when it is heated to the boiling point, which is the temperature when the liquid's vapour pressure equals the i.e. changes on the liquid by the outer air. Freezing is a phase transition that occurs when the heat of a liquid falls below its freezing temperature. According to the internationally accepted definition, freezing refers to the crystallisation phase change of a liquid or even the strimmer of a substance, which is usually caused by cooling. In science, boiling occurs when a liquid turns into a gas, forming bubbles within the liquid volume. Water is the most commonly used boiled liquid in cooking.
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Classify each of the following organic reactions. Substitution Elimination Addition Reaction Type of Reaction CH3-CH2-CH2-CH3 + Cl, CH2-CH2-CH2-CH3 + HCI CI CH3-CH=CH-CH; + Cl, → CH3-CH-CH-CH3 CH3-CH2-CH-CH3 CH3-CH2-CH=CH2 + HCI CI
The first reaction is addition reaction, second reaction is substitution reaction, and third reaction is elimination reaction.
In organic chemistry, addition reaction refers to an organic reaction in which two or more molecules combine to generate a bigger one (the adduct). An addition reaction occurs when two or more reactants combine to form a product without the loss of any atoms present in the reactants. A substitution reaction refers to a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. It is chemical reactions in which an atom, ion, or group of atoms or ions in a molecule is replaced by another atom, ion, or group. An elimination reaction refers to is a type of chemical reaction where several atoms either in pairs or groups are removed from a molecule. The removal usually takes place due to the action of acids and bases or the action of metals.
Note: The question is incomplete. The complete question is attached.
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What is the solubility of NaCl at 20 C?
At 20°C, the solubility of NaCl in water is approximately 36.0 g/100 mL, or 36.0 g/L.
What is solubility?Solubility is the ability of a substance to dissolve in a liquid. It is a measure of how much of a substance can be dissolved in a given amount of a liquid. Solubility is affected by temperature, pressure, and the presence of other substances. Different substances have different solubilities; for example, sugar is more soluble in water than salt.
This means that at this temperature, 36.0 g of NaCl will dissolve in every 100 mL of water, or 36.0 g of NaCl will dissolve in every liter of water. The solubility of NaCl is temperature dependent, meaning that the solubility will change as the temperature changes.
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how many unique h1h1 nmr and c13c13 nmr signals exist for each compound? a. h1h1 nmr signals in a c13c13 nmr signals in a b. h1h1 nmr signals in b c13c13 nmr signals in b c. h1h1 nmr signals in c c13c13 nmr signals in c d.
There are distinct h1h1 & c13c13 nmr signals for each molecule, which are a.3, b.3, and c2.
How many distinct h1 NMR & c13 NMR signals are there for each benzene compound?All locations in benzene are identical to one another.As a result, all six hydrogen atoms produce just one signal for proton NMR, and all 6 carbon atoms produce just one signal in 13-C NMR.
Inside a 13C NMR experiment, how so many signals will each of the molecules below produce?These substances each produce three signals!Similar to the examples before, we can determine that two carbon atoms are equivalent by looking at the symmetry planes of a molecule.
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Draw the Lewis dot structure for each of the following: hexane (C6H14), isopropyl alcohol(C3H7OH), methanol (CH3OH) and saline (H2O). You may want to practice drawing organic molecules with multiple "central" atoms before you attempt the Lewis Dot structures for these molecules.These should be hand drawn
Lewis dot structures, also known as electron dot structures, are diagrams that depict the chemical bonds that exist between atoms in a molecule. They also show the total number of lone pairs in each of the atoms that make up the molecule.
A Lewis Electron Dot Formula has one dot for each valence electron and the symbol of the element. The stages for articulating the electron dot formula are listed below. Make a skeletal structure with only the element symbols that shows a realistic bonding pattern.
Pick up every two electrons from each atom and simply throw them into a fictitious container known as an electron pot. To determine the number of bonds, use the N - A = S equation.
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What is the concentration of a solution that has 15 grams of a solute and 5 liters of water?
The concentration of a solution that has 15 grams of a solute and 5 liters of water is 3 g/L (grams per liter).
What is concentration?Concentration is the ability to focus one's attention on a task or activity, blocking out distractions and remaining focused on the task at hand. It is a skill that helps us to stay focused and avoid being easily sidetracked. Concentration is often thought of as being a key factor in academic success, as well as having an important role in the workplace. It can also be beneficial in everyday life, helping us to stay organized and on top of our commitments and responsibilities.
Concentration is a skill that can be developed and improved with practice. Strategies such as setting specific goals, breaking down complex tasks into smaller steps, and taking regular breaks can help to improve concentration. Additionally, reducing distractions such as background noise, social media, and other forms of entertainment can help to create an environment that is more conducive to concentration. Finally, making sure to get enough rest and exercise can also help to improve concentration.
It is calculated by dividing the mass of the solute (15 grams) by the volume of the solution (5 liters). To put it another way, the concentration of the solution is 3 grams of solute for every liter of water. This type of concentration is commonly expressed as either g/L or mg/L (milligrams per liter).
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The element with an electron configuration of 1s22s22p63s23p64s23d2 is in group__ and period__. The element with an electron configuration of 1s22s22p63s23p6 is in group__and period __.
A group is the column in the periodic table of chemical elements while the period is the row in the periodic table of the elements.
The electron configuration an element describes how electrons are distributed in its atomic orbitals. The atomic number of the element is used.
According to this question;
1s²2s²2p⁶3s²3p⁶4s²3d² has atomic number 22 and hence, is titanium. 1s²2s²2p⁶3s²3p⁶ has atomic number 18 and hence, is ArgonTitanium is in group 4 and period 4 of the periodic table while Argon is in group 18 and period 3.
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What is the 2 in oxygen called?
Answer:
diatomicExplanation:
Oxygen has two allotropic forms, diatomic (O2) and triatomic (O3, ozone).
What are the types of reaction?
Combination reaction is one of the five main categories of chemical reactions. reaction of decomposition. displacing response. Reaction with double displacement. Reaction to precipitation.
Which of the five reactions are they?Combination, decomposition, single-replacement, double-replacement, and combustion are the five fundamental types of chemical reactions. chemical reaction, often known as the conversion of one or more chemicals (sometimes referred to as reactants) into one or more other compounds (the products).
What exactly are endothermic and exothermic reactions?Endothermic reactions are chemical processes in which the reactants absorb heat energy from their surroundings to produce products. The reaction absorbs energy from its surroundings.
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what is the radius of the hydrogen-atom bohr orbit shown in the figure? (figure 1)
Therefore, the initial Bohr orbit's radius is r=0.53(1)22=0.265 A. The mean radius of an electron's orbit around the nucleus of a hydrogen atom in its ground state.
This radius' value, a, is determined by a physical constant that is roughly equivalent to 5.29177 x 10 -11 metres (m). Logic and Approach: Z is the first atomic number, or atom. Therefore, rn = 0.529n2 is the radius of the nth orbit. The Bohr orbit's(a0), a physical constant, is roughly equivalent to the distance between the nucleus and electron hydrogen in the ground state of a hydrogen atom. Due of its significance in the Bohr model of an atom, it bears Niels Bohr's name. 5.29177210903(80)1011 m is its value.
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Identify the type of energy this object possesses. A girl roller-skating Kinetic energy Potential energy
A girl roller-skating has kinetic energy.
Kinetic energy is the energy of motion. It is the energy possessed by an object due to its movement. In this case, the girl roller-skating has kinetic energy because she is moving.
Potential energy is the energy an object possesses due to its position or configuration. It is the energy an object has stored within it, ready to be released. An object at rest has potential energy because it has the potential to be set in motion and does work.
So, in this case, the girl roller-skating has kinetic energy because she is moving, and not potential energy because she is not at rest.
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Classify each of the following atomic-scale views. Pure element Pure compound Mixture of an Element and a compound Mixture of Two Elements Mixture of Two compounds
Atomic-scale views and there clasifications:
Pure element: A single element, such as an atom or molecule, that is not combined with any other elements.Pure compound: A combination of two or more elements in a fixed ratio, held together by chemical bonds.Mixture of an Element and a compound: A combination of one element and one compound, which are not chemically bonded together.Mixture of Two Elements: A combination of two elements, which are not chemically bonded together.Mixture of Two compounds: A combination of two compounds, which are not chemically bonded together.The Differences between Pure Elements, Pure Compounds, and MixturesThe world of chemistry is filled with an incredible diversity of elements and compounds, each with its own unique properties and characteristics. Understanding the differences between pure elements, pure compounds, and mixtures can help us to better understand these materials, and how they interact with each other. In this essay, we will look at the defining characteristics of each type of substance, and explore their applications in the world of chemistry.
Pure elements are substances composed of only one type of atom. Examples of pure elements include oxygen, hydrogen, and iron. These elements have distinct chemical and physical properties, and because they are not combined with any other elements, they do not form compounds. Pure elements are essential for all life on Earth, as they form the building blocks of all biological molecules. They are also used in a wide variety of industries, from automobile manufacturing to consumer electronics.
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Which statement is TRUE about elements in group 16?
They need 6 electrons to complete their octet.
They have 2 valence electrons.
The have an oxidation number of 2+
They have an oxidation number of 2-
Six electrons occupy the outermost shell in the electron configurations of the elements in Group 16 of the periodic table, which distinguish them from other elements.
What is true about elements in group 16?Any of the six chemical elements that make up Group 16 (VIa) of the periodic table—oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium—is referred to as an oxygen group element (Lv). Tellurium was given its place by 1865, and polonium was discovered in 1898. The first three members of the group were connected as early as 1829, with tellurium being allocated its position. Livermorium, the sixth member of Group 16, was produced in a particle accelerator by Russian and American researchers in 2000.After hydrogen, helium, and neon, oxygen is estimated to make up about 4 percent of all atoms in the universe. However, as hydrogen atoms make up the majority of the remaining atoms and helium makes up the majority of the remaining atoms, the significance of this ranking is negligible.To Learn more About periodic table, refer To:
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A reaction reaches dynamic equilibrium at a given temperature when a) the amount of products exceeds the amount of reactants. b) kfwd equals krev. c) opposing reactions cease and the system is static. d) the relative amounts of reactants and products are constant and ratefwd = raterev.
A reaction reaches dynamic equilibrium at a given temperature when the relative amounts of reactants and products are constant and rate fwd = rate rev. Option D is the correct answer.
What is dynamic equilibrium of a reaction?This refers to the state of a given system in which the reversible reaction taking place ceases to change the ratio of reactants and products, but there is a movement of substances between the reactants and the products.
Hence, a reaction reaches dynamic equilibrium at a given temperature when reactants change into products and products change into reactants even after equilibrium is achieved. But the rate of forward and backward reactions are the same.
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What will be the freezing point of an aqueous solution containing 80.0 g of NaCl?
The freezing point of an aqueous solution containing 80.0 g of NaCl will be -21.2 °C.
What is aqueous solution?An aqueous solution is a solution that consists of a solvent and solute, where the solvent is water. Water is able to dissolve many different types of molecules and ions, making it an ideal solvent for many applications. Aqueous solutions are ubiquitous in nature and form the basis of many biological processes. In chemistry, aqueous solutions are used as a medium to conduct chemical reactions, as they allow for the solubilization of reactants and products.
This is because NaCl is an electrolyte and increases the freezing point of a solution by lowering the vapor pressure. When NaCl dissolves in water, it separates into individual ions and the ions interact with the water molecules, making it harder for the water molecules to escape into the vapor phase, which in turn increases the boiling point and decreases the freezing point. The freezing point depression of an aqueous solution containing 80.0 g of NaCl can be calculated using the formula ΔTf = Kf·m, where Kf is the molar freezing point constant for water and m is the molality of the solution. The molality of the solution can be calculated by dividing the mass of the solute (NaCl) by its molar mass and then dividing that by the mass of the solvent (water). So, the molality of the solution is 0.522 mol/kg and the freezing point depression is -21.2°C.
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difference between metals and non-metals with the reference to :
A) Number of electrons in outer or valent shell
B) Formation of cation and anion
C) Reaction with dilute action
Answer:
C) Reaction with dilute action
Explanation:
Metals are good conductors of electricity and heat.
Non-metals are insulators that don't allow heat and electricity to pass through them. Hence, non-metals are bad conductors of electricity and heat.
Silver has two isotopes, one with 60 neutrons and the other with 62 neutrons. The natural abundance of these are 51.83% and 48.17% respectively. Give the chemical notation for each of these isotopes and calculate the average atomic mass for silver.
The average atomic mass of silver is approximately 108.3324. The mass of an atom is defined as its atomic mass.
How to calculate atomic mass ?The two isotopes of silver are Ag-107 (60 neutrons) and Ag-109 (62 neutrons).
To calculate the average atomic mass of silver, we need to multiply the mass of each isotope by its natural abundance, then add these values together.
Ag-107 has a mass of 107
Natural abundance of 51.83%,
so its contribution to the average atomic mass of silver is 107 * 0.5183 = 55.8391
Ag-109 has a mass of 109 and a natural abundance of 48.17%,
so its contribution to the average atomic mass of silver is 109 * 0.4817 = 52.4933
The average atomic mass of silver is the sum of these two values,
which is 55.8391 + 52.4933 = 108.3324.
So, the average atomic mass of silver is approximately 108.3324.
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what is the final pressure in the bottle for a monatomic gas, for which cv,m = 3r/2?
The final pressure in the bottle for a monatomic gas is 1.20*10^3 Pa.
Given that,
lnitial temperature T = 328 K
Pressure P = 1.606 *10^5 Pa
After the gas expands adiabatically,
P' = 1.203 * 10^5 Pa
Temperature = T'
[tex]P^{f} = P' * (P'/P)^{1-gamma/gamma} \\P^{f} = P^{1/gamma}* P^{gamma-1/gamma}\\[/tex]
For monatomic gas (CV, m = 3R/2 , gamma = 5/3),
[tex]P^{f} = (1.203*10^5)^{3/5}*(1.606*10^5)^{(5/3-1)/5/3} \\ = 1117.27 * 116.59\\ = 1.30 * 105 Pa[/tex]
Part B:
For diatomic gas ( CV, m = 5R/2 , gamma = 7/5)
[tex]P^{f} = (1.203*10^5)^{5/7}*(1.606*10^5)^{(7/5-1)/7/5} \\P^{f} = 1.20*10^{3}Pa[/tex]
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What does Apollo offend Cupid do?
Apollo boasted to Cupid about how much larger his bow was. Apollo was offended, and Cupid hit him with a golden love arrow in retaliation, leading him to fall in love with the first person he saw.
Who was punished by Apollo for having a human lover?
Daphne, in her effort to escape him, was changed into a laurel, his sacred tree; Coronis was shot by Apollo's twin, Artemis, when she proved unfaithful; and Cassandra rejected his advances and was punished by being made to utter true prophecies that no one believed.5 days ago
What enraged Eros against Apollo?Apollo unexpectedly advised Eros to leave warlike weapons to powerful gods like him and stick to magic instead after defeating Python, a terrible earth-dragon that lived near Delphi.
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What is the freezing point of a solution that contains 10.0 g of glucose c6h12o6 in 100 g of h2o?
The freezing point of a solution containing 10.0 g of glucose C6H12O6 in 100 g of H2O is -0.53°C.
What is freezing point?Freezing point is the temperature at which a liquid turns into a solid. It is the temperature at which a liquid's vapor pressure is equal to the atmospheric pressure. The freezing point of pure water is 0°C (32°F), while most other liquids have different freezing points. Some liquids, such as ethanol, have a lower freezing point than water, while others, such as propylene glycol, have a higher freezing point.
This is because the freezing point depression of a solution is dependent on the amount of solute present within a given amount of water. Glucose, being a solute, causes the freezing point of the solution to decrease.
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Why does freezing point decrease when pressure increases?
When the pressure of a liquid is increased, so is the number of molecules that can fit into a given space.
What is freezing point?Freezing point is the temperature at which a liquid turns into a solid. The freezing point of a substance is the temperature at which its molecules stop moving and form into a solid crystal. Generally, the freezing point of a liquid is lower than its boiling point. For example, water freezes at 32°F (0°C) and boils at 212°F (100°C).
This compression of molecules increases the interactions between them and weakens the intermolecular bonds that hold them together. This weakening of the bonds reduces the amount of energy needed to separate the molecules, causing the freezing point to decrease. In other words, when the pressure of a liquid increases, the molecules are more tightly packed and the freezing point decreases.
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QUESTION 3 All of the following are homogeneous mixtures except A. hydrogen gas and chlorine gas. B. sodium chloride and potassium chloride. OC. mercury-zinc solution. OD. hydrochloric acid solution. O E. sodium chloride and potassium chlSride solution.
Answer:
hydrogen gas and chlorine
Explanation:
HCl is a chemical compound and aqueous solution form of HCl is a homogeneous solution
All the following are homogeneous mixtures except hydrogen gas and chlorine gas. Therefore, option A is correct.
What do you mean by homogeneous mixture ?A mixture is said to be homogeneous if its composition is constant throughout. Because the dissolved salt is evenly distributed throughout the whole salt water sample, the salt water described above is homogeneous.
It is single in composition throughout. There is only one phase of matter observed in a homogeneous mixture.
In an aqueous solution of hydrogen chloride gas, water serves as the solvent and the solute, respectively. Hence, hydrogen chloride is a homogeneous mixture rather than a compound.
When hydrogen chloride is dissociated and solvated in water to create hydrochloric acid, it counts as a homogeneous mixture.
Thus, option A is correct.
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Can you put lemon juice in a metal bowl?
Acid in lemon juice reacts with metal containers to produce harmful chemicals. As a result, lemon juice is not kept in such containers.
What is Acid ?
Acidic substances are typically easy to recognise by their sour flavours. A molecule that can donate an H+ ion and keep its energetic favorability even after losing H+ is a basic definition of an acid. Blue litmus paper is known to turn red when exposed to acids.
Bases, on the other hand, have a smooth consistency and a bitter flavour. A base that may dissolve in water is known as alkali. When these substances interact chemically with acids, salts are created. Red litmus has a history of becoming blue on bases.
The definitions of the terms acid and base vary depending on how one chooses to see the properties of acidity and basicity.
Lemon juice has a strong acidic flavor and can react with some metals. Lemon juice can corrode or rust metal when it comes into touch with it. This is so that iron oxide, a new chemical created by the reaction between the metal and the acid in lemon juice, can be formed.
Reddish-brown iron oxide is a less powerful material than pure iron. Iron oxide will keep combining with oxygen in the air over time to coat the metal in a thick film of rust.
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