Question

The rate of disappearance of HCl(aq) was measured for the followingreaction:

CH3OH(aq) + HCl(aq) ---> CH3Cl(aq) + H2O(l)

Data collected:

Exp. # Time(min) [HCl](M)

1 0.0 1.85

2 54.0 1.58

3 107.0 1.36

4 215.0 1.02

5 430.0 0.580

What is the overall reaction rate for experiment 4?

I'm stuck on how to approach this problem. I cannot find anyreference to use.

Thank you!!!