Question

a) What are the factors which effect the rate of a chemical reaction?
b) Derive the rate constant formula for zero order reaction?
c) Draw a diagram showing effect of catalyst on activation energy.

Answer 1

a) The factors which effect the rate of a chemical reaction are temperature, pressure, concentration, and catalysts. They can either slow down the rate or speed it up.
b) The rate constant formula for zero order reaction:
$A\to$ products.
At time $t=0$,
$\left[A\right]=aM$
At time $t$,
$\left[A\right]=(a-x)M$
x is the change in the concentration.
$\frac{dx}{dt}=k[A{]}^0=k$
$dx=kdt$
On integration we get, $x=kt+I$
I is integration constant
At $t=0,x=0$ and hence, $I=0$
$x=kt$
$k=\frac{x}{t}$

c) The diagram showing effect of catalyst on activation energy is as shown. Catalyst provides alternate pathway of lower activation energy.