Study on Reaction Between Propionaldehyde and Hydrocyanic Acid

Question

The reaction between propionaldehyde and hydrocyanic acid has been studied at 25°C. In a certain aqueous solution at 25°C the concentrations at various times were as follows:

 
t/min                                             2.78         5.33      8.17       
[HCN]/mol L^-1                               0.0990    0.0906    0.0830       
[C₃H₇CHO]/mol L^-1                       0.0566    0.0482    0.0406       
                   
t/min                                             15.13       19.80        ∞       
[HCN]/mol L^-1                               0.0706    0.0653    0.0424       
[C₃H₇CHO]/mol L^-1                       0.0282    0.0229    0.0000    

What is the order of the reaction, and what is the value of the rate constant k?

Summary

The question belongs to Chemical Engineering and it is about the reaction between propionaldehyde and hydrocyanic acid at 25°C. The order of the reaction and its value of the rate constant k needs to be calculated.

Note: The solution is in handwritten format.