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If 0.41 M solution of an .18 acid (HA) has a pH of 2.0; then the Kb of the conjugate *:base (A-) of this acid

If 0.41 M solution of an .18 acid (HA) has a pH of 2.0; then the Kb of the conjugate *:base (A-) of this acid is (bo 2.5) x 10-11 4 x 10-11 5 x 10-11 2 X 10-113

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