Question

Which of the following is true according to the law of a conservation of mass for a reaction involving a catalyst?

• A. Mass of reactant = Mass of catalyst + Mass of product
• B. Mass of reactant + Mass of catalyst = Mass of product
• C. Mass of reactant = Mass of product

Answer 1

The correct option is C Mass of reactant = Mass of product

• Catalyst is a substance that causes the reaction to occur faster or slower without undergoing any chemical change itself.
• It does not participate in the reaction.
• Therefore, mass of a catalyst has no effect on the mass of the products formed.
• So, Mass of reactants = Mass of products.