Question

1) In the following reactions i) Identify the oxidation state of the elements involved and ii)...

1) In the following reactions

i) Identify the oxidation state of the elements involved and

ii) Indicate what element is being oxidized and what is being reduced.

iii) Indicate how many electrons were transferred in the reaction

a) 2CH₃OH+3O₂→2CO₂+4H₂O

b) Zn+I₂→ZnI₂

c) Pb+PBO₂+2H₂SO₄→2PbSO₄+2H₂O

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Homework Answers

Answer #1

a) 2CH₃OH+3O₂→2CO₂+4H₂O

oxidation state of carbon -3 oxidation state of oxygen 0 oxidation state of Carbon in CO2 is +4

Methanol has been oxidized and oxygen is reduced .

7 e- was transferred.

b) Zn+I₂→ZnI₂

oxidation state of Zinc 0 oxidation state of oxygen 0 oxidation state of Zn in ZnI2 is +2

Zinc has been oxidized and Iodine is reduced .

2 e- was transferred.

c) Pb+PBO₂+2H₂SO₄→2PbSO₄+2H₂O

oxidation state of Pb 0 oxidation state of Pb in PbO2 is +4 oxidation state of Pb in PbSO4 +2

Pb has been oxidized and PbSO4is reduced .

2 e- was transferred.

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