Calculate the approximate concentration of a product in this sequential reaction.

Question

The question, exactly, is : 

For the given sequential reaction 

A →B→C , k₁ and k₂ are the respective rate constants

Initial concentration of A is 20M. Calculate the approximate concentration of C after 10 min, if k₁ = 2×10⁸ min^-1 & k₂ = 0.0693 min^-1 

I can't seem to find the correct expression for the concentration of C at any time t. I looked it up online and found some answers but they all were just values put in some formula. Please explain with steps.  

Answer 1

Here is your solution

Comments

How did you get the expression of [C] in the last tine of the first page. Funny this is exactly the solution given on another website . I wrote my question after seeing this solution as it doesn’t explain the derivation of [C].