1 answer

Part B short answer: (30 points). Show your work clearly and write your answers in the space provided. Report answer...

Question:

Part B short answer: (30 points). Show your work clearly and write your answers in the space provided. Report answers with un

Part B short answer: (30 points). Show your work clearly and write your answers in the space provided. Report answers with units where possible. 1 A. (5 points) A solution is pre cd(OH)2 (Kp 2.5 x 10) precipitate from this solution, and d by adding 400.0 mL of 2 x 10 M Cd(NO,) and 500.0 mL of 3 x 1o M NaOH. what is the ion product for Cd(OH)2? Will it precipitate? Circle one: Yes No. lon product: .Zo 5 points) What is the hydronium ion concentration of a 0.20 M solution of trimethylamine (CH3)sN; K 7.4 x 103 В Hydronium ion concentration: C. (5 points) What is the pH of a solution that is 0.45 M hypobromous acid (HBrO) Ka 2 x 10- which contains 0.30 M Calcium hypobromite pH: 2 A. (15 points) A titration of 0.3 M Ba(OH)2 against a 25 mL solution of 0.6 M of thioacetic acid (HC2H3OS; pK 3.33) was performed. (1 point) Write the balanced equation for the above reaction. 1. 2. (2 points) Before any Ba(OH)2 was added, what was the pH? pH:

Answers


15 Lavoro concentration -8.89XIOM = 400 x 2 x 10 400 +500 com ] = 500 X3x1031.67x105M 400 +500 Q = [cd 2+] [OH-32-(8.89x166)(

2)

1) balanced equation :

2 HC2H3OS (aq) + Ba(OH)2 (aq) ------------> Ba(C2H3OS)2 (aq) +   2 H2O (l)

2)

pH = 1/2 (pKa - log C)

    = 1/2 (3.33 - log 0.6)

pH = 1.78

.

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