Question

What is rate constant?

Answer 1

Rate constant:

• The constant which defines the relationship between the molar concentration of the reactants and the rate of the chemical reaction is known as the rate constant.
• The rate constant is symbolized as $k$.

Units of rate constant:

• Rate constant is dependent on the temperature.
• For zero-order reaction, rate constant's unit is $\mathrm{mol}{\mathrm{L}}^{-1}{\mathrm{s}}^{-1}$.
• For first-order reaction, rate constant's unit is ${\mathrm{s}}^{-1}$.
• For second-order reaction, rate constant's unit is ${\mathrm{mol}}^{-1}\mathrm{L}{\mathrm{s}}^{-1}$.