Question

Which of the following is the correct expression for Ksp for Zn3(PO4)2? A) ) Кsp = [Zn2+] [PO3-4] / [Zn3(PO4)2] B) Ksp = [Zn2+ ] [PO3-4) C) Ksp = [Zn2+]3 [Po3-4]2 D) Ksp = [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2]

Answer 1

The correct expression for the solubility product constant (Ksp) of Zn3(PO4)2 is option D) Ksp = [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2].

Step-by-step explanation:

The correct expression for the solubility product constant (Ksp) of Zn3(PO4)2 is option D) Ksp = [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2].

The stoichiometry of the formula for Zn3(PO4)2 indicates that 3 Zn2+ ions and 2 PO3-4 ions are formed for every Zn3(PO4)2 that dissolves. Therefore, the Ksp expression should include the concentrations of Zn2+ and PO3-4 ions raised to their respective stoichiometric coefficients.

In this case, the correct expression is [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2].

Answer 2

The correct expression for Ksp for Zn3(PO4)2 is D) Ksp = [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2].

Step-by-step explanation:

The correct expression for Ksp for Zn3(PO4)2 is D) Ksp = [Zn2+]3 [PO3-4]2 / [Zn3 (PO4)2]. The stoichiometry of the formula of the ionic compound determines the form of the Ksp expression. In the case of Zn3(PO4)2, for every unit of Zn3(PO4)2 that dissolves, three Zn2+ ions and two PO3-4 ions are formed, hence the expression [Zn2+]3 [PO3-4]2. The denominator [Zn3 (PO4)2] in the expression accounts for the concentration of the undissolved compound.