Multiplying reactions involves multiplying all coefficients in a balanced chemical equation by some factor. This affects both rate constants for forward/reverse reactions and equilibrium constants.
Consider baking cookies - if you double your recipe (multiply it by 2), you'll need twice as many ingredients (reactants) and will end up with twice as many cookies (products). Similarly, when we multiply a chemical reaction, all coefficients in the equation are multiplied by the same factor.
Coefficient: A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4x).
Rate Constant: The proportionality constant in the equation that expresses the rate of a reaction.
Stoichiometry: The calculation of quantities in chemical reactions, based on balanced equations.
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