   # Balance the following equations, and then write the net ionic equation: (a) Zn(s) + HCl(aq) → H 2 (g) + ZnCl 2 (aq) (b) Mg(OH) 2 (s) + HC1(aq) → MgCl 2 (aq) + H 2 O( ℓ ) (c) HNO 3 (aq) + CaCO 3 (s) → Ca(NO 3 ) 2 (aq) + H 2 O( ℓ ) + CO 2 (g) (d) (NH 4 ) 2 S(aq) + FeCl 2 (aq) → NH 4 C1(aq) + FeS(s) ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 3, Problem 36PS
Textbook Problem
3 views

## Balance the following equations, and then write the net ionic equation:(a) Zn(s) + HCl(aq) → H2(g) + ZnCl2(aq)(b) Mg(OH)2(s) + HC1(aq) → MgCl2(aq) + H2O(ℓ)(c) HNO3(aq) + CaCO3(s) → Ca(NO3)2(aq) + H2O(ℓ) + CO2(g)(d) (NH4)2S(aq) + FeCl2(aq) → NH4C1(aq) + FeS(s)

(a)

Interpretation Introduction

Interpretation:

The given equation has to be balanced and net ionic equation for the given aqueous solution should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

### Explanation of Solution

The given compound is zinc and hydrochloric acid.  In this reaction zinc reacts with hydrochloric acid to give zinc chloride and hydrogen gas.

Zn (s) +  HCl (aq)  ZnCl2 (s) + H2 (g)

Balance the equation,

Balance the hydrogen atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.

There are two hydrogen atoms in the right side and one hydrogen atoms in the left side. Therefore two molecule of hydrochloric acid is added to left side of reaction.  Therefore the balanced equation is given below

(b)

Interpretation Introduction

Interpretation:

The given equation has to be balanced and net ionic equation for the given aqueous solution should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

(c)

Interpretation Introduction

Interpretation:

The given equation has to be balanced and net ionic equation for the given aqueous solution should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

(d)

Interpretation Introduction

Interpretation:

The given equation has to be balanced and net ionic equation for the given aqueous solution should be written.

Concept introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

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