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IF HA IS A WEAK ACID, WHICK EQUILIBRIUM CORRESPONDS TO THE ACID EQUILIBRIUM CONSTANT Ka for...

IF HA IS A WEAK ACID, WHICK EQUILIBRIUM CORRESPONDS TO THE ACID EQUILIBRIUM CONSTANT Ka for Ha?

a. HA (aq) + H2O (l)<--->H2A+ (aq) + OH- (aq)

b. A- (aq) + H3O+ (aq)<---> HA (aq) + H2O (l)

c. HA (aq) + OH-(aq)<---> H2O (l) + H+ (aq)

d. A- (aq) +H2 O (l)<---> HA (aq) + OH- (aq)

e. A- (aq) + OH- (aq)<---> HOA2- (aq)

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Homework Answers

Answer #1

Given, HA is a weak acid,

The equilibrium reaction for HA is,

HA(aq) + H2O(l) A-(aq) + H3O+(aq)

Since H3O+ species is present in the equilibrium reaction, We write the Acid equilibrium constant(Ka).

If we reverse the reaction,

A-(aq) + H3O+(aq) HA(aq) + H2O(l)

The Acid equilibrium constant value will inverse of the Ka but the value is the acid equilibrium constant.

Thus, Option (B) A-(aq) + H3O+(aq) HA(aq) + H2O(l) is the acid equilibrium constant for HA.

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