Find the rate constant for the reaction:
[Ni(H2O)6]2+(aq) + NH3(aq) → [Ni(H2O)5(NH3)]2+(aq) + H2O(l)
Where the reaction is first order in [Ni(H2O)6]2+ and zero order in NH3, the initial concentration of all reactants are 1 M, and the half-life of the reaction was found to be 2000 s.
Possibly useful information:
Zero order: t½ = [A]o/2k
First order: t½ = 0.693/k
Second order: t½ = 1[A]ok
The total order of reaction is 1 so the first order equation can be used:
Solving for k gives k = 0.693/t½
k = 0.693/2000 = 3×10–4 s–1.