Carleen 319 Views May 29, 2016, 06:19:06 PM Question Solved Share Tweet What is a half-life? Is the half-life for a first-order reaction dependent on concentra-tion? What will be an ideal response? Brett May 29, 2016, 06:34:16 PM #1 Answer The half-life of a chemical reaction is the time it takes for the initial reactant con-centration to be reduced by exactly one half. The half-life for a first order reaction does not depend on initial reactant concentration. Veronique May 29, 2016, 06:44:23 PM #2 My sincere thanks.