   Chapter 17, Problem 61QAP ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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# . A saturated solution of nickel(II) sulfide contains approximately 3.6 × 10 − 4 g of dissolved NiS per liter at 20°C. Calculate the solubility product K for NiS at 20 °C.

Interpretation Introduction

Interpretation:

The Ksp value for nickel (II) sulfide, NiS at 20°C is to be calculated.

Concept Introduction:

The solubility product is represented by Ksp. The solubility product describes the solubility of the solid substance in the solvent at the particular temperature. The term “solubility product” is only used for those substances that are not completely soluble in water.

Explanation

The saturated solution of nickel (II) sulfide, NiS contains approximately 3.6×104g/L of NiS.

To calculate the solubility of nickel (II) sulfide, NiS in mol/L, the formula used is,

Solubility(mol/L)=SolubilitygL×1molar massmolg

Molar mass of NiS is 90.76g/mol.

Substitute the value of molar mass and solubility (g/L) of nickel (II) sulfide, NiS in the given formula.

Solubility(mol/L)=3.6×104gL×190.76molg=4.0×106mol/L

The solubility of nickel (II) sulfide, NiS is 4.0×106mol/L.

The chemical reaction for the solubility of NiS is,

NiS(s)Ni2+(aq)+S2(aq)4

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