4 A sample 100 containing 100 mL of o300 M HCo is mixed with

4. A sample 10.0 containing 100 mL of o.300 M HC.o, is mixed with 5.00 ml 0.0500 M KMnO. The purple color of the permanganate disappears after 37.5 s. Mn0s and H2C204 in the mixture. (Hint: use the Calculate the initial concentrations of K dilution equation.) a. b. Calculate the rate constant (k) for this reaction.

Solution

a)[H₂C₂O₄]=10X0.3/15=0.2mM

[KMnO₄]=5X0.05/15=0.016mM

b) rate constant=change in concentration/time

=0.016/37.5

=4X10^-4