Question

1. drag and drop the names to the reactions.

______ $2\ce{nh_{3}} + \ce{h_{2}so_{4}} \
ightarrow (\ce{nh_{4}})_{2}\ce{so_{4}}$
______ $4\ce{c_{5}h_{9}o} + 27\ce{o_{2}} \
ightarrow 20\ce{co_{2}} + 18\ce{h_{2}o}$
______ $3\ce{pb} + 2\ce{h_{3}po_{4}} \
ightarrow 3\ce{h_{2}} + \ce{pb_{3}(po_{4})_{2}}$
______ $\ce{li_{3}n} + 3\ce{nh_{4}no_{3}} \
ightarrow 3\ce{lino_{3}} + (\ce{nh_{4}})_{3}\ce{n}$
______ $2\ce{na_{2}o} \
ightarrow 4\ce{na} + \ce{o_{2}}$
choices

• single replacement
• synthesis
• decomposition
• combustion
• double replacement

Explanation:

Step1: Analyze first reaction

The reaction \(2\text{NH}_3 + \text{H}_2\text{SO}_4
ightarrow (\text{NH}_4)_2\text{SO}_4\) is a synthesis reaction because two substances combine to form one product. So we match it with "synthesis".

Step2: Analyze second reaction

The reaction \(4\text{C}_5\text{H}_9\text{O} + 27\text{O}_2
ightarrow 20\text{CO}_2 + 18\text{H}_2\text{O}\) is a combustion reaction as it involves a substance reacting with oxygen to produce carbon dioxide and water. So we match it with "combustion".

Step3: Analyze third reaction

The reaction \(3\text{Pb} + 2\text{H}_3\text{PO}_4
ightarrow 3\text{H}_2 + \text{Pb}_3(\text{PO}_4)_2\) is a single replacement reaction where lead replaces hydrogen in phosphoric acid. So we match it with "single replacement".

Step4: Analyze fourth reaction

The reaction \(\text{Li}_3\text{N} + 3\text{NH}_4\text{NO}_3
ightarrow 3\text{LiNO}_3 + (\text{NH}_4)_3\text{N}\) is a double replacement reaction as the cations and anions switch partners. So we match it with "double replacement".

Step5: Analyze fifth reaction

The reaction \(2\text{Na}_2\text{O}
ightarrow 4\text{Na} + \text{O}_2\) is a decomposition reaction as a single compound breaks down into simpler substances. So we match it with "decomposition".

Answer:

1. \(2\text{NH}_3 + \text{H}_2\text{SO}_4

ightarrow (\text{NH}_4)_2\text{SO}_4\): synthesis

1. \(4\text{C}_5\text{H}_9\text{O} + 27\text{O}_2

ightarrow 20\text{CO}_2 + 18\text{H}_2\text{O}\): combustion

1. \(3\text{Pb} + 2\text{H}_3\text{PO}_4

ightarrow 3\text{H}_2 + \text{Pb}_3(\text{PO}_4)_2\): single replacement

1. \(\text{Li}_3\text{N} + 3\text{NH}_4\text{NO}_3

ightarrow 3\text{LiNO}_3 + (\text{NH}_4)_3\text{N}\): double replacement

1. \(2\text{Na}_2\text{O}

ightarrow 4\text{Na} + \text{O}_2\): decomposition