For the following reaction, it is found that doubling the amount of A causes the reaction rate to double while doubling the amount of B causes the reaction rate to quadruple. What is the best rate law equation for this reaction?

A + B yields 2C

rate = k[A]2[B]

rate = k[A][B]

rate = k[A][B]2

rate = k[A]1/2[B]

Question

For the following reaction, it is found that doubling the amount of A causes the reaction rate to double while doubling the amount of B causes the reaction rate to quadruple. What is the best rate law equation for this reaction? 

A + B yields 2C

 rate = k[A]2[B]

 rate = k[A][B]

 rate = k[A][B]2

 rate = k[A]1/2[B]

anonymous · Answer

When you double the amount of A and that causes the reaction to double you have a first order relationship and that means the exponent is going to be 1. When you double the amount of B and it quadruples then you have a second order relationship and the exponent would be 2.