Question

< Homework 8 Problem 10.32-Enhanced- with Feedback You may want to reference (Pages 338-340) Section 10.5 while completing this problem. Calculate the (OH value of each aqueous solution. Part A oven cleaner, with [H3O+ ]--1.0 × 10-12 M Express your answer using two significant figures. 圏? Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B milk of magnesia with [H30' ] :-2.0 × 10-9 M. Express your answer using two significant figures Submit Request Answer

Answer 1

I have calculated part A .b.c on first page and part d on 2nd page

Part A rightarrow KW = [H_3O+] [OH-] 2KW = 1 times 10^-14 1 times 10^-14 = [1.0 times 10^-12 M] times [OH^-] 1 times 10^-14/1.0 times 10^-12 M = [OH^-] Ans rightarrow [OH^-] = 10^-2 M Part B rightarrow KW = [H_3O^+] [OH^-] 1 times 10^-14 = [2.0 times 10^-9 M] [OH^-] [OH^-] = 1 times 10^-14/2 times 10^-9 M = 5 times 10^-6 M Part C rightarrow KW = [H_30^+] [OH^-] 1 times 10^-14 = 16.0 times 10^-4 M] [OH^-] [OH^-] = 1 times 10^-14/6.0 times 10^-4 Ans rightarrow [OH^-] = 1.6 times 10^-11 M Part D rightarrow KW = [H_3O^+] [OH^-] 1 times 10^-14 = [4.0 times 10^-9 M] [OH^-] [OH^-] = 1 times 10^-14/[4 times 10^-9] [OH^-] = 2.5 times 10^-6