Question

In: Chemistry

Which element is oxidized and which is reduced in the following reactions? Note: the atom identified...

Which element is oxidized and which is reduced in the following reactions? Note: the atom identified is in the reactant.

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the Cl atom in
Si(s)+2Cl2(g)→SiCl4(l)

the Cl atom in
SbCl3(s)+Cl2(g)→SbCl5(s)

the Sb atom in
SbCl3(s)+Cl2(g)→SbCl5(s)

the Cl atom in
Cl2(g)+2NaBr(aq)→                Br2(aq)+2NaCl(aq)

the Br atom in
Cl2(g)+2NaBr(aq)→                Br2(aq)+2NaCl(aq)

the Si atom in
Si(s)+2Cl2(g)→SiCl4(l)

Solutions

Expert Solution

1)

the Cl atom in
Si(s)+2Cl2(g)→SiCl4(l)

oxidation state of Cl in Cl2 is 0

oxidation state of Cl in SiCl4 is -1

Since oxidation state of Cl is decreasing, the Cl atom is reduced

2)

the Cl atom in
SbCl3(s)+Cl2(g)→SbCl5(s)

oxidation state of Cl in Cl2 is 0

oxidation state of Cl in SbCl5 is -1

Since oxidation state of Cl is decreasing, the Cl atom is reduced

3)

the Sb atom in
SbCl3(s)+Cl2(g)→SbCl5(s)

oxidation state of Sb in SbCl3 is +3

oxidation state of Sb in SbCl5 is +5

Since oxidation state of Sb is increasing, the Sb atom is oxidised

4)

the Cl atom in
Cl2(g)+2NaBr(aq)→                Br2(aq)+2NaCl(aq)

oxidation state of Cl in Cl2 is 0

oxidation state of Cl in NaCl is -1

Since oxidation state of Cl is decreasing, the Cl atom is reduced

5)

the Br atom in
Cl2(g)+2NaBr(aq)→                Br2(aq)+2NaCl(aq)

oxidation state of Br in NaBr is -1

oxidation state of Br in Br2 is 0

Since oxidation state of Br is increasing, the Br atom is oxidised

6)

the Si atom in
Si(s)+2Cl2(g)→SiCl4(l)

oxidation state of Si in Si is 0

oxidation state of Si in SiCl4 is +4

Since oxidation state of Si is increasing, the Si atom is oxidised

queen_honey_blossom answered 2 years ago
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