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Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:

aCas+H2OlCaOH2aq+H2g

bNaNO3sNaNO2s+O2g

cC2H2g+H2gC2H6g


Short Answer

Expert verified

The classifications of the given reactions are:

(a) Displacement reaction

(b)Decomposition reaction

(c) Combination reaction

Step by step solution

01

Write balanced reaction of equation (a) 

The given reaction is:

Cas+H2OlCaOH2aq+H2g

The balanced reaction is:

Cas+2H2OlCaOH2aq+H2g

The given redox reaction is a displacement reaction.

The calcium atom replaces two hydrogen atoms and formsCaOH2.

02

Write balanced reaction of equation (b) 

The given reaction is:

NaNO3sNaNO2s+O2g

The balanced reaction is:

2NaNO3s2NaNO2s+O2g

The given redox reaction is a decomposition reaction.

In this reaction,NaNO3 decomposes and formsNaNO2 andO2.

03

Write balanced reaction of equation (c)

The given reaction is:

C2H2g+H2gC2H6g

The balanced reaction is:

C2H2g+2H2gC2H6g

The given redox reaction is a combination reaction.

In this reaction,C2H2andH2 combines and formsC2H6.

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