If the rate law for a reaction is Rate = k[CIO_3^-][I^-][H^+]^2 what are the uni
ID: 535314 • Letter: I
Question
If the rate law for a reaction is Rate = k[CIO_3^-][I^-][H^+]^2 what are the units of k when the unit of time is seconds and the unit of concentration moles per liter? A) mol/(L middot s) B) (L middot s)/mol C) mol^2/(L^2 middot s) D) L^2/(mol^2 middot s) E) L^3/(mol^3 middot s) If a reaction is second-order in a reactant, when the concentration of the reactant is decreased by a factor of 2, the reaction rate will A) remain constant. B) decrease by a factor of 1/4. C) decrease by a factor of 1/2. D) double. E) quadruple. The reaction between selenous acid and the iodide ion in acid solution is H_2SeO_3(aq) + 6I^-(aq) + 4H^+(aq) rightarrow Se(s) + 2I_3^-(aq) + 3H_2O(I) The data in the following table were measured at 0 Degree C. Tripling the initial concentration of H_2SeO_3 while holding the initial concentrations of H^+ and I^- constant increases the rate of the reaction by a factor of A) 1. B) 2. C) 3. D) 4. E) 8.Explanation / Answer
4. With the given rate, the units of k is,
E) L3/(mol^3.s)
5. For a second order reaction, when concentration of reactant is decreases by a factor of 2, rate would,
B) decrease by factor 1/4
6. For the given reaction,
Tripling the concentration of H2SeO3 would increase the rate by,
C) 3