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Chapter 4: Q21E (page 217)

Complete and balance the following acid-base equations:

(a)HCl gas reacts with solidCa(OH)2

(b) A solution ofSr(OH)2is added to a solution ofHNO3.

Short Answer

Expert verified

(a)\(2HCl\left( g \right) + Ca{\left( {OH} \right)_2} \to CaC{l_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

(b)\(Sr{\left( {OH} \right)_2}\left( {aq} \right) + 2HN{O_3}\left( {aq} \right) \to Sr{\left( {N{O_3}} \right)_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

Step by step solution

01

Formation of calcium chloride salt

For anacid-base reaction, the products are salt and water.

First balance the calcium atoms, and then the chloride atoms, followed by the hydrogen and oxygen atoms.

\(2HCl\left( g \right) + Ca{\left( {OH} \right)_2} \to CaC{l_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

Use the balancing table to check:

Element

Reactant

Product

Balanced? yes

Ca

1x1

1x1

1=1

Cl

2x1

1x2

2=2

H

2x1+1x2

2x2

4=4

O

1x2

2x1

2=2

02

Formation of strontium nitrate salt

First balance the strontium atoms and the nitrate ions, followed by the hydrogen and oxygen atoms.

\(Sr{\left( {OH} \right)_2}\left( {aq} \right) + 2HN{O_3}\left( {aq} \right) \to Sr{\left( {N{O_3}} \right)_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

Use the balancing table to check:

Element

Reactant

Product

Balanced? yes

Sr

1x1

1x1

1=1

N

2x1

1x2

2=2

H

1x2+2x1

2x2

4=4

O

1x2+2x3

1x6+2x1

8=8

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Most popular questions from this chapter

What mass of CO is required to react with 25.13g of Fe2O3 according to the equation

\(F{e_2}{O_3} + CO \to 2Fe + 3C{O_2}\)

Indicate what type or types of reaction each of the following represents:

(a) \({H_2}O\left( g \right) + C\left( s \right) \to CO\left( g \right) + {H_2}\left( g \right)\)

(b) \(2KCl{O_3}\left( s \right) \to 2KCl\left( s \right) + 3{O_2}\left( g \right)\)

(c) \(Al{\left( {OH} \right)_3}\left( {aq} \right) + 3HCl\left( {aq} \right) \to AlC{l_3}\left( {aq} \right) + 3{H_2}O\left( l \right)\)

(d) \(Pb\left( {N{O_3}} \right)\left( {aq} \right) + {H_2}S{O_4}\left( {aq} \right) \to PbS{O_4}\left( s \right) + 2HN{O_3}\left( {aq} \right)\)

What mass of gallium oxide Ga2O3 can be prepared from 29 g of gallium metal? The equation for the reaction is \(4Ga + 3{O_2} \to 2G{a_2}{O_3}\)

Silver can be separated from gold because silver dissolves in nitric acid while gold does not. Is the dissolution of silver in nitric acid an acid-base reaction or an oxidation-reduction reaction? Explain your answer.

Complete and balance each of the following oxidation-reduction reactions, such that it results in the highest possible oxidation states for the oxidizing atoms:

(a)\(K\left( s \right) + {H_2}O\left( l \right) \to \)

(b)\(Ba\left( s \right) + HBr\left( {aq} \right) \to \)

(c) \(Sn\left( s \right) + {I_2}\left( s \right) \to \)
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