The pH of a 0.150 M solution of a weak base is 10.98.Calculate the pH of a 0.0603 M solution of the base.
A)3.22
B)10.78
C)7.57
D)6.43
E)none of these

Question

Quizplus · Accepted Answer

The pH of a weak base solution depends on its concentration and the base's ionization constant (Kb). Since the pH of the 0.150 M solution is 10.98, we can calculate the Kb and then use it to find the pH of the 0.0603 M solution. The pH of 10.78 is consistent with the expected decrease in pH due to the lower concentration of the base.

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