BASIC PRINCIPLES

Hint

For the general case :

Example :

For the reaction 2A → B, the rate of reaction can be expressed as:

r = - ½d[A]/dt = + d[B]/dt

Note : The -d[A]/dt term is multiplied by (1/2) since there are two A molecules as reactants, and the +d[B]/dt term is multiplied by (1/1) since there is one B molecule as a product.

Review Question

For the reaction NO + NO₃ → 2NO₂ , the rate of reaction can be expressed as

r = + d[NO]/dt = + d[NO₃]/dt = - ½ d[NO₂]/dt

r = + d[NO]/dt = + d[NO₃]/dt = - d[NO₂]/dt

r = - d[NO]/dt = + d[NO₃]/dt = + ½ d[NO₂]/dt

r = - d[NO]/dt = - d[NO₃]/dt = + ½ d[NO₂]/dt

r = - d[NO]/dt = - d[NO₃]/dt = + d[NO₂]/dt