Question

For the following species, answer the questions below:

Na⁺ (aq), Cl^─ (aq), Ag⁺ (aq), Ag (s), Zn²⁺(aq), Zn (s), Pb (s)

Which is the strongest oxidizing agent?

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Which is the strongest reducing agent?

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Which species can be oxidized by SO₄^2─ (aq) in acidic solution? (one choice in each row)

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Which species can be reduced by Al (s)? (One choice in each row)

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Na+

Cl─

Ag+

Ag

Zn2+

Zn

Pb

Answer 1

• The strongest oxidizing agent is Ag⁺ [ Pb, Zn , chloride ion , are better reducing agents.] This can be concluded based on potential values of species provided in Electro chemical series. of the given species silver has highest positive reduction potential value.
• The strongest reducing agent among the given is zinc which has highest negative reduction potential value .
• ZInc is oxidized by sulphate ion to Zn⁺²

Lead is also oxidized by sulphate to Pb⁺²

• Aluminum reduces Zn⁺² to Zn ( aluminum is above Zn in electro chemcial series with higher negative reduction potential value than zinc)

Aluminum reduces Ag⁺ to Ag ( aluminum is above Ag in electro chemcial series with higher negative reduction potential value than Ag)

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The best choices are given for the above question among the available species.