Write the ksp expression for the sparingly soluble compound zinc cyanide, zn(cn)2.

Kps = [Zn²⁺].[CN⁻]²

Explanation:

Let's consider the solution of zinc cyanide.

Zn(CN)₂(s) ⇄ Zn²⁺(aq) + 2 CN⁻(aq)

The solubility product (Kps) is the equilibrium constant for this solution, that is, the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients. Only aqueous species are included in the expression of kps.

The Kps is:

Kps = [Zn²⁺].[CN⁻]²

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the right answer is c i just did the question.