Chemical kinetics

Question

The half life of a zero order reaction was found to be 10 minutes when the initial concentration was 1.0 mole per litre. What will be the half life period if the initial concentration is made 2 moles per litre?

Answer 1

For a zero order reaction we have the following condition:

This is the half-life equation for a zero order reaction. We can now solve the problem. We must solve for k.

10 min =  1M/2k 

k = 0.05

Therefore, if the concentration is 2 M, the half-life would be: