Problem: Which of the following chemical reactions is an oxidation-reduction reaction?a) Zn + S → ZnSb) H2SO4 + 2 NaOH → Na2SO4 H2Oc) CO2 + H2O → H2CO3d) AgNO3 + NaCl → AgCl NaNO3

FREE Expert Solution

To classify each of the following as a redox reaction or a non-redox reaction:

a) Zn + S → ZnS

b) H2SO4 + 2 NaOH → Na2SO4 H2O

c) CO2 + H2O → H2CO3

d) AgNO3 + NaCl → AgCl NaNO3

For Redox reactions, oxidation and reduction both occur in a reaction:


Recall the mnemonics LEO GER.

Lose               Gain

Electron         Electrons

Oxidation       Reduction


Step 1: Determine oxidation state:

Zn + S → ZnS

 Changes in O.S.:

Zn:        0  +2         increased/lost electrons oxidation

S:         –2           decreased/gained electrons reduction


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Problem Details

Which of the following chemical reactions is an oxidation-reduction reaction?

a) Zn + S → ZnS

b) H2SO4 + 2 NaOH → Na2SO4 H2O

c) CO2 + H2O → H2CO3

d) AgNO3 + NaCl → AgCl NaNO3

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