Question

A reaction is second order in A and first order in B.
a) Write the differential rate equation.
b) How is the rate affected on increasing the concentration of A three times?
c) How is the rate affected when concentration of both A and B are doubled?

Answer 1

$\frac{d\left[C\right]}{dt}=R\left[A{]}^2\right[B]$

If $\left[A\right]$ inc by $3$ times rate increases $9$ times

If $\left[A\right]$ & $\left[B\right]$ both are double

$r^1=4\times 2\times \times r$

$=8r$, ie $8$ times