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Find the concentration and pH solution.

1.What is the concentration of Cu2+ in a solution that is 0.10 M Cu(NH3)42+? (Kf = 1.2 x 1012)
A.8.5 x 10-5
B.2.8 x 10-4
C.8.0 x 10-4
D.5.1 x 10-4
E.3.8 x 10-4

2.What is the concentration of Ni2+ in a solution that is 1.0 M Ni(NH3)62+? (Kf = 1.8 x 108)
A.7.2 x 10-4
B.2.1 x 10-4
C.1.4 x 10-2
D.3.2 x 10-4
E.5.8 x 10-4

3. What is the pH of a solution of 0.65 M acid and 0.51 M of its conjugate base if the pKa = 5.30?
A.5.19
B.6.05
C.5.62
D.5.85
E.5.41

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