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If 0.51 M solution of an acid (HA) has a pH .18 of 2.0; then the Kb of the conjugate base (A-) *:of this acid

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If 0.51 M solution of an acid (HA) has a pH .18 of 2.0; then the Kb of the conjugate base (A-) *:of this acid is (bj 2.5) x 10-11 4 x 10-11 3 x 10-11 5 x 10-112

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