CHM 2046 Quiz 2A Spring, 2006
Answer all questions. Be careful to give your final answer to the correct significant figures.
1. a) (3 points) The acetate ion (CH COO) is 3 weak base. Write down the baseionization
equation for CH COO in water.
b) (2 points) Complete the expression for the baseionization constant (K ) for CH COO. b 3
c) (5 points) Calculate the pH of a 0.40 M solution of CH COO (K for CH COOH = 1.8 x 10 ). 5
3 a 3
2. a) (3 points) Calculate the pH when 100 mL of 0.100 M Ca(OH) solution is added t2 50 mL of
0.400 M HCl solution.
b) (2 points) Which one of the following salts will give a basic solution when dissolved in
water? Circle your choice.
CaCl ,2NH Cl,4 NaClO , Na4SO , K2, no4e of these
(2 points) Write an equation for the reaction that occurs when the salt dissolves in water and
makes the solution basic, or state why none do.
c) (2 points) Which on