Balance each of the following chemical equations. a. KO 2 ( s ) + H 2 O( l ) ⟶ KOH( aq ) + O 2 ( g ) + H 2 O 2 ( aq ) b. Fe 2 O 3 ( s ) + HNO 3 ( aq ) ⟶ Fe(NO 3 )( aq ) + H 2 O( l ) c. NH 3 ( g ) + O 2 ( g ) ⟶ NO( g ) + H 2 O ( g ) d. PCl 5 ( l ) + H 2 O( l ) ⟶ H 3 PO 4 ( aq ) + HCl( g ) e. CaO( s ) + C ( s ) ⟶ CaC 2 ( s ) + CO 2 ( g ) f. MoS 2 ( s ) + O 2 ( g ) ⟶ MoO 3 ( s ) + SO 2 ( g ) g. FeCO 3 ( s ) + H 2 CO 3 ( aq ) ⟶ Fe(HCO 3 ) 2 ( aq )

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Explanation of Solution

According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed. Therefore a chemical equation, having lesser number of moles of an element on either side of a reaction, is balanced using appropriate numerical coefficients to satisfy the law of conservation of mass.

The given reaction is,

KO2(s)+H2O(l)→KOH(aq)+O2(g)+H2O2(aq)

Adding the coefficient 2 to H2O balances the number of atoms of hydrogen present on either side of the reaction

Answer 6

(b)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Answer 7

(c)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Answer 8

(d)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Answer 9

(e)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Answer 10

(f)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Answer 11

(g)

Interpretation Introduction

Interpretation: A balanced form of the given chemical equations is to be stated.

Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

To determine: A balanced form of the given chemical equation.

Chemistry: An Atoms First Approach

Solutions

Chemistry: An Atoms First Approach

Explanation of Solution

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