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In a reaction A → B, if the rate of formation of B is 0.1 mol/L·s, what is the r

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Question: In a reaction A → B, if the rate of formation of B is 0.1 mol/L·s, what is the rate of disappearance of A?

Options:

  1. 0.1 mol/L·s
  2. 0.05 mol/L·s
  3. 0.2 mol/L·s
  4. 0.1 L/mol·s

Correct Answer: 0.2 mol/L·s

Solution: 

For the reaction A → B, the rate of disappearance of A is equal to the rate of formation of B, hence it is 0.1 mol/L·s. However, if stoichiometry is considered as 1:1, the rate of disappearance of A is also 0.1 mol/L·s.

In a reaction A → B, if the rate of formation of B is 0.1 mol/L·s, what is the r

Practice Questions

Q1
In a reaction A → B, if the rate of formation of B is 0.1 mol/L·s, what is the rate of disappearance of A?
  1. 0.1 mol/L·s
  2. 0.05 mol/L·s
  3. 0.2 mol/L·s
  4. 0.1 L/mol·s

Questions & Step-by-Step Solutions

In a reaction A → B, if the rate of formation of B is 0.1 mol/L·s, what is the rate of disappearance of A?
  • Step 1: Identify the reaction. We have a reaction where A turns into B, written as A → B.
  • Step 2: Understand what 'rate of formation of B' means. It tells us how fast B is being produced in the reaction.
  • Step 3: Note the given rate of formation of B, which is 0.1 mol/L·s.
  • Step 4: Recognize that in a simple reaction like A → B, the rate of disappearance of A is related to the rate of formation of B.
  • Step 5: Since the reaction is a 1:1 conversion (1 mole of A makes 1 mole of B), the rate of disappearance of A is the same as the rate of formation of B.
  • Step 6: Therefore, the rate of disappearance of A is also 0.1 mol/L·s.
  • Rate of Reaction – Understanding the relationship between the rate of formation of products and the rate of disappearance of reactants in a chemical reaction.
  • Stoichiometry – Applying stoichiometric coefficients to determine the rates of reactants and products in a balanced chemical equation.
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