Question

3. This reaction can be used to analyze for iodide ion. 10 g + 5 + 6H ) ------→ 313 + 3H2O) When the rate of this reaction was studied at 25 °C, the results in the table were obtained. a. Use these data to determine the order of the reaction with respect to each of these species. Outline your reasoning in each case. [T], M [10, ), M [H],M Reaction rate, mol/L's 0.010 0.10 0.010 0.60 0.040 0.10 0.010 2.40 0.010 0.30 0.010 5.40 0.010 0.10 0.020 2.40 ii. [103] iii. [H] b. Calculate the specific rate constant for this reaction and give its units. c. Based on the kinetics, discuss the probability of this reaction occurring in a single step. d. The kinetics of reactions are often studied under pseudo first-order conditions. Describe what is meant by the term pseudo first order and illustrate how the reaction conditions above would be changed so that the [1] would be pseudo first order. e. The activation energy for this reaction was found to be 84 kJ/mol at 25 °C. How much faster would this reaction proceed if the activation energy were lowered by 10 kJ/mol (for example, by using a suitable catalyst)?

Answer 1

ene os Wsing the table, 0.60 k Co 10)Co.01 Co.o1) -(i ) 2-40 K Co1o) Co.04) (o-01)? -G) 5 40 KCo.30) Co.o1)3 Co.o1)2Gi') 2-40 K (o10) Coo1)o.02)2 -v) wsing i)) k Co-10) C0-ou)Co-01)2 K (0.10) Coo1) Co.01)2 44 2-40 У 1 useng Ci)d, k(o 3 0) Co.01 Co.01 K (o-103 (O-01) Co.o1) 2 using iv) (o-1C.0(0-02) k (o 1o)0 Co.01) 2.40 4 O.6 0 2 2 2

From Eq K (0.10)mot) x Co o1) Cmat ) Co.o1mot 0.60 met s 2. к (med t)s х 10 х 10 х 4 6 1o moi"L's In a sinyla-u^ raaebon, th ordur eaekéon ad tea ame as nunn of raaatantsfhaia. e, or the raactm 3 J2 3 H20 So, thi nrt a oction iuqlar ef

he neadtm wm aeudo- fivt ordur wr. to I maintained eantran KJmai Gen, KJma RT8.314x 298 Tma 2.47 Kmei 1%.4776 k2 K e