Question

For the elementary reaction, $2\mathrm{a}+\mathrm{b}\to \mathrm{Products}$ the active mass of $\mathrm{b}$is kept constant and that of $\mathrm{a}$ is doubled. The rate of reaction will be

Answer 1

Active mass:

1. The quantity of mass involved in a reaction is referred to as active mass, and it is the effective concentration of a substance.
2. The product of active masses is directly related to the rate of chemical change. The rate of a reaction is defined as the change in concentration of reactants or products per unit time (number of moles per liter).
3. When the active mass of a is doubled, the rate of reaction increases four times.
4. Rate$=\mathrm{K}{\left[a\right]}^2\left[b\right]$.

Therefore, when the active mass is doubled, the reaction rate increases four times.