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FAQs on Equivalent Weight - MCQ(Solved), Chemistry (IIT-JEE and AIPMT)

1. What is equivalent weight in chemistry?
Ans. Equivalent weight in chemistry is defined as the mass of a substance that can combine with or displace one mole of hydrogen ions (H+) or any other equivalent of a given chemical species. It is also known as gram equivalent weight.
2. How is equivalent weight related to valency?
Ans. Equivalent weight is related to valency as it is calculated by dividing the atomic weight of an element by its valency. This means that equivalent weight is directly proportional to the valency of an element.
3. What is the difference between normality and molarity?
Ans. Normality and molarity are both units of concentration in chemistry. However, normality is defined as the number of equivalents of solute per liter of solution, while molarity is defined as the number of moles of solute per liter of solution. Normality takes into account the valence of the solute, while molarity does not.
4. How do you calculate equivalent weight?
Ans. The formula to calculate equivalent weight is: Equivalent weight = Atomic weight / Valence For example, the equivalent weight of sulfuric acid (H2SO4) is calculated as follows: Equivalent weight = Molecular weight / Acidic hydrogen ions Equivalent weight of H2SO4 = 98 / 2 = 49 So, the equivalent weight of sulfuric acid is 49 g/equivalent.
5. What is the significance of equivalent weight in redox reactions?
Ans. Equivalent weight plays a significant role in redox reactions as it helps to determine the amount of one substance that can be oxidized or reduced by another substance. In a redox reaction, the reducing agent donates electrons and undergoes oxidation, while the oxidizing agent accepts electrons and undergoes reduction. The equivalent weight of each substance involved in the reaction is used to balance the equation and determine the stoichiometry of the reaction.
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