   # A solution contains 0.25 M Ni(NO 3 ) 2 and 0.25 M Cu(NO 3 ) 2 . Can the metal ions be separated by slowly adding Na 2 CO 3 ? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no volume change on addition of Na 2 CO 3 . ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 15, Problem 60E
Textbook Problem
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## A solution contains 0.25 M Ni(NO3)2 and 0.25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no volume change on addition of Na2CO3.

Interpretation Introduction

Interpretation: The possibility of separation of Ni(NO3)2 and Cu(NO3)2 from a solution having 0.25M of each complex the addition of Na2CO3 is to be stated.

Concept introduction: The qualitative analysis is used for the detection of ions present in a given solution. The ions have a tendency to give a particular product with a given reagent. This forms the basis for the analysis of given ions.

### Explanation of Solution

Explanation

To determine: The possibility of separation of Ni(NO3)2 and Cu(NO3)2 from a solution having 0.25M of each complex the addition of Na2CO3

Given

The concentration of Ni(NO3)2 is 0.25M .

The concentration of Cu(NO3)2 is 0.25M .

The Ksp for NiCO3 is 1.4×107 .

The Ksp for CuCO3 is 2.5×1010 .

The concentration of CO32 is calculated as,

Ksp=[Ni2+][CO32]

Substitute the value of Ksp and concentration of [Ni2+] in the above equation as,

Ksp=[Ni2+][CO32]1.4×107=0.25M[CO32][CO32]=5

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