Question

1 dm3 of 2 M CH3 COOH is mixed with 1 dm3 of 3 M ethanol to form ester. The decrease in the initial rate if each solution is diluted with an equal volume of water would be

Ans 0.25 times

Answer 1

When each solution is diluted by equal volume of water, the concentration of each chemical is reduced to half the original.
We assume that this is an elementary reaction which leads to the conclusion that the order of this reaction would be 2.
The rate equation is v=k[CH2COOH]1×[C2H5OH]1. Hence the rate decreases by a factor of 12×12=14=.25
Thus the rate after dilution will be 4 times lesser than earlier rate.