Question

For the following chemical reactions, which is (are) Redox reactions? For the redox reaction, sketch how oxidation number change, and which is reduced and which is oxidized?

1) Zn +2HCl(aq) = ZnCl2 (aq) + H2

2) CaCl2 (aq) + Na2CO3 (aq) = CaCO3 (s) +2 NaCl (aq)

3) NH3 (aq) + HCl (aq) = NH4Cl (aq)

4) C8H18 ( gasoline) +25/2 O2 = 9H2O + 8CO2 (g)

3. To prepare 500ml 1.0M HNO3, how much 3.0M HNO3 is required and how much water should be added?

Answer 1

hope this helps u

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