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2) If the Ka of a weak acid is 1

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2) If the Ka of a weak acid is 1.6 x 10*, the Kb of its conjugate base partner must be which of the following? a.
6.20 d. 6.3 x 10 b. 1.0 x 10- e. 7.80 C. 6.8 x 10

3) Which of these is present in all acid-base systems? a.
hydronium ions b. hydroxide ions C. oxygen ions d. a and b e. a, b, and c