Question

<Assignment 16 Chap 14: Integrated Rate Law and Half Life Problem 14.47 Review Part B Consider the following hypothetical aqueous reaction: A (aq) → B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected: What is the rate constant for the reaction? Express your answer using two significant figures. Time (min) 0 10 20 30 40 Moles of A 0.065 0.051 0.042 0.036 0.031 150 AXO A O O ? k = 1.25 • 10 Symbols M-min-1 Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining Part What is the half-life for the reaction? Express your answer using two significant figures.

need help with part b and c

Answer 1

B. From units of K, it is concluded that 2nd order Reaction.

For 2nd order, K= 1/t{1/at-1/ao)

K= 1/10{1/0.051-1/0.065)

K= 1/10( 19.6-15.3)

K= 1/10(4.3)

K=0.43 M-1.s-1

C. For 2nd order, half life= 1/Kao

= 1/0.43x0.064

= 1/0.02795

= 35.77

~ 36 sec.