Question

What is the rate constant of the decomposition of a reactant A, whose concentration is decreasing at a rate of 0.05 M/s and whose initial concentration is 0.1 M? The reaction is first order with respect to A and follows the rate law: Rate = k[A].

Answer 1

Given the rate law for a first-order reaction: Rate = k[A], where Rate is the rate of the reaction, k is the rate constant, and [A] is the concentration of reactant A.We are given the rate of the reaction  Rate  as 0.05 M/s and the initial concentration of reactant A  [A]  as 0.1 M. We need to find the rate constant  k .Plugging the given values into the rate law equation:0.05 M/s = k 0.1 M To solve for k, divide both sides of the equation by 0.1 M:k =  0.05 M/s  /  0.1 M k = 0.5 s^-1 The rate constant  k  for the decomposition of reactant A is 0.5 s^-1 .