Explanation Cobalt ( II ) sulfide consists of cobalt cation Co 2+ and sulfide ion, S 2 − . Based on the charges, the formula of cobalt ( II ) sulfide must be Co 2 S . Cobalt ( II ) sulfide is an insoluble salt. In metathesis reaction, if the product is insoluble, then to separate it from the reaction mixture, it is important that the other product is soluble and the reactants are soluble. For metathesis reaction, one reactant will provide the cation Co 2+ and the other reactant will provide the anion S 2 − . From solubility rule, sulfides of the group 1A are soluble

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ISBN: 9781119497325

Author: JESPERSEN

Publisher: WILEY

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Chapter 4, Problem 23PE

Interpretation Introduction

Interpretation:

The criteria satisfied by reactants to prepare cobalt (II) sulfide using a metathesis reaction and the equation for the reaction, are to be written.

Concept Introduction:

A metathesis reaction or a double replacement reaction is a reaction in which the cations or anions of the two reactants replace each other.

An acid-base neutralization is a reaction in which reaction of acids and bases takes place to form a salt.

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Chapter 4, Problem 22PE

Chapter 4, Problem 24PE

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Chapter 4 Solutions

CHEMISTRY:MOLECULAR NATURE (LL)W/ACCESS

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Solution Summary: The author explains how reactants prepare cobalt (II) sulfide using a metathesis reaction.

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Chapter 4 Solutions