Question

Define the rate of a chemical reaction.

Answer 1

The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.

Consider the reaction A $\to$ B,

Rate of the reaction is given by,

Rate = $-\frac{d\left[A\right]}{dt}=+\frac{d\left[B\right]}{dt}$

Where, [A] $\to$concentration of reactant A

[B] $\to$concentration of product B

(-) Negative sign indicates a decrease in the concentration of A with time.

(+) Positive sign indicates an increase in the concentration of B with time.