SCN-, the following reaction is first order in iron(III),Fe3+; the rate constant is 1.27/s in the Presence of excess thiocyanate ion.
Fe3+ (aq) + SCN-(aq) _______>Fe(SCN)2+ (aq)
1. Determine the half-life in seconds?
2. Determine the numbers of Seconds would be needed for the initial concentration of Fe 3+ to decrease to each of following values: 25% left, 12% left, 6.25% left, 3.125% left?