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Introductory Chemistry: A Foundati...

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

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. Most hydroxides are not very soluble in water. For example, for nickel(II) hydroxide. Ni(OH)2, is 2.0 × 10 15 at 25 °C. How many grams of nickel(ll) hydroxide dissolve per liter at 25 °C?

Interpretation Introduction

Interpretation:

The number of grams of nickel (II) hydroxide, Ni(OH)2 dissolved per liter at 25°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 Ksp value for nickel (II) hydroxide, Ni(OH)2 is 2.0×1015 at 25°C. The chemical reaction for the solubility of Ni(OH)2 is,

Ni(OH)2(s)Ni2+(aq)+2OH(aq)x2x

Where x shows the solubility of each ion in mol/L.

The expression for the solubility product ( Ksp ) of nickel (II) hydroxide is given as,

Ksp=[Ni2+][OH]2=x×(2x)2=4x3

Substitute the Ksp value for nickel (II) hydroxide, Ni(OH)2 in the given equation

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