Q4.89P

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

$(a) S b (s) + C l_{2} (g) \to S b C l_{3} (s)$

$(b) A s H_{3} (g) \to A s (s) + H_{2} (g)$

$(c) Z n (s) + F e {(N O_{3})}_{2} (a q) \to Z n {(N O_{3})}_{2} (a q) + F e (s)$

Verified

Answer

The classification of the given reactions are:

(a) Combination reaction

(b) Decomposition reaction

1Step 1: Write balanced reaction of equation (a)

The given reaction is:

$S b (s) + C l_{2} (g) \to S b C l_{3} (s)$

The balanced reaction is:

$2 S b (s) + 3 C l_{2} (g) \to 2 S b C l_{3} (s)$

The given redox reaction is a combination reaction.

In this reaction, $Sb$ and $C l_{2}$ combines and forms $S b C l_{3} .$

2Step 2: Write balanced reaction of equation (b)

The given reaction is:

$A s H_{3} (g) \to A s (s) + H_{2} (g)$

The balanced reaction is:

$2 A s H_{3} (g) \to 2 A s (s) + 3 H_{2} (g)$

The given redox reaction is a decomposition reaction.

In this reaction, ${AsH}_{3}$ decomposes and forms $As$ and $H_{2} .$

3Step 3: Write balanced reaction of equation (c)

The given reaction is:

$Z n (s) + F e {(N O_{3})}_{2} (a q) \to Z n {(N O_{3})}_{2} (a q) + F e (s)$

The balanced reaction is:

$Z n (s) + F e {(N O_{3})}_{2} (a q) \to Z n {(N O_{3})}_{2} (a q) + F e (s)$

The given redox reaction is a displacement reaction.

The $Zn$ atom replaces iron atom from $F e {(N O_{3})}_{2}$ and forms $Z n {(N O_{3})}_{2} .$

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