The following equations represent the various ways a salt could dissolve and rea

Question

The following equations represent the various ways a salt could dissolve and react with water. (C^+ = cation, A^- = anion) a. CA + H_2 O = C^+ + A^- + H_2 O b. CA + H_2 O = HA + C^+ + OH^- c. CA + H_2 O = COH + A^- + H^+ d. CA + H_2 O = COH + HA i) Which equation(s) represent(s) hydrolysis that results in an acidic solution? Explain. ii) Which equation(s) represent(s) hydrolysis that results in a basic solution? Explain. iii) Which equation(s) represent(s) solution(s) with no change in pH? Explain.

Explanation / Answer

(i) Hydrolysis resulting in an acidic solution always give H+ ion in the product. hence option c. is the correct choice as the H+ ion is generated in the Product.

(ii) Hydrolysis resulting in a basic solution always give OH- ion in the product. hence option b. is the correct choice as the OH- ion is generated in the product.

(iii) Answer : The Equations in Option a. & Option d. both does not result in a pH change. As Net charge of the Products are Nullified as Neutralisation reaction Occurs. Hence resulting in a Zero pH change.

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