State and explain the law of mass action.

Explanation

It states that the rate of reaction is directly proportional to the product of molar concentration of reactants at constant temperature, at any given time.
Explanation
Consider a general reaction, `A + B rarr` Products
Then, according to law of mass action rate of reaction `prop [A][B]`
or rate K[A][B]
Where, K is called rate constant or specific velocity constant.