Question

Give the individual reaction orders for all of the following substances and the overall reaction order from the following rate law: Rate = k[BrO_3^-][Br^-][H^+]^2 Order with respect to BrO_3^-: Order with respect to Br^-: Order with respect to H^+: Order overall:

Answer 1

The rate of a reaction is dependent on the concentration of one or more reactants and this dependence is evident from the rate equation of that reaction. the concentration of the reactants appears in the rate equation raised to some power which are the individual orders of reaction with respect to that reactant. Overall order is the sum total of the individual orders.

For the given reaction

Rate = k [BrO₃^-] [Br^-] [H⁺]²

Order with respect to BrO₃^- = 1 (this means rate of reaction will double if we double the concentration of BrO₃-)

Order with respect to Br^- = 1 (this means rate of reaction will double if we double the concentration of Br-)

Order with respect to H⁺= 2 (this means rate of reaction will quadruple if we double the concentration of H+)

Overall order = 1 + 1+ 2 = 4