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(acacH+H2O =acac- + H3O+ ) hi, according to this equilibrium equation , is the following explanation...

(acacH+H2O =acac- + H3O+ ) hi, according to this equilibrium equation , is the following explanation correct?


sodium acetate is the conjugate base of acetic acid(a weak acid). Its addition results in a shift in the acid dissociation equilibrium to the right. This also leads to a reduced proton concentration and consequently an increase in the pH of the solution . this increased acac- concentration caused the equilibria associated with the formation of the product complex to shift right to compensate. As a consequence, more [Fe(acac)3]is produced.

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Answer #1

Correct explanation is given below.

In aqueous solution sodium acetate conjugate base of weak acid dissociates as

CH3COONa CH3COO- + Na+.

Acetic acid in water ionises to form the equlibrium .

CH3COOH + H2O CH3COO- + H3O+.

Now, by le-chatelier's principle,

When sodium acetate is added to the solution of acetic acid due to common ion (acac-) the equilibrium shifted to left side.

Hence, the dissociation of Acetic acid is suppressed and concentration of acac- ion has decreased.

This leads to a reduced H3O+ concentration and consequently pH increases.

As a result less [Fe(acac)3] is produced.

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