Consider 1000. mL of a 1.00 10 -4 -M solution of a certain acid HA that

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Consider 1000. mL of a 1.00 × 10^-4-M solution of a certain acid HA that has a K_a value equal to 1.00 × 10^-4. How much water was added or removed (by evaporation) so that a solution remains in which 25.0% of HA is dissociated at equilibrium? Assume that HA is nonvolatile.

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