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3. A 0.75 M solution of weak base has a pH of 11.00. Find the Kb. [K. = 1.3 x 10- ] 4. A solution

3. A 0.75 M solution of weak base has a pH of 11.00. Find the Kb. [K. = 1.3 x 10- ] 4. A solution having a pH of 9.00 contains 0.20 M of fluoride ion (F-) which is a weak base. Find the K. of fluoride ion. [K. = 5.0 x 10-10]

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