Chemistry Redox and Ionic Equations Quiz

Determine the oxidation state of Nitrogen in nitric acid (HNO₃).

• +5

• +3

• -1

• +1

Iron reacts with water to form iron(III) oxide and hydrogen gas. 4Fe + 3H₂O → 2Fe₂O₃ + 3H₂ Which substance is oxidized in this reaction?

• Fe₂O₃

• H₂O

• H₂

• Fe

What is the oxidation number of sulfur in SO₂?

• +4

• -2

• +2

• +6

In the reaction: 2Na(s) + Cl₂(g) → 2NaCl(s), Chlorine is:

• Reduced

• Oxidized

• Unchanged

• A catalyst

In the reaction: Fe(s) + Cu²⁺(aq) → Fe²⁺(aq) + Cu(s), which substance is oxidized?

• Cu²⁺

• Cu

• Fe²⁺

• Fe

In the reaction: C + O₂ → CO₂ What role does oxygen play?

• Oxidizing agent, undergoes oxidation

• Reducing agent, undergoes reduction

• Oxidizing agent, undergoes reduction

• Spectator ion

Which of these reactions is a redox reaction?

• HNO₃ + KOH → KNO₃ + H₂O

• H₂ + Br₂ → 2HBr

• NH₃ + HCl → NH₄Cl

• AgNO₃ + NaCl → AgCl + NaNO₃

What is the net ionic equation for the reaction between hydrosulfuric acid and magnesium hydroxide?

• Mg²⁺ + 2OH⁻ + 2H⁺ + S²⁻ → 2H₂O + MgS

• H₂S + Mg(OH)₂ → MgS + 2H₂O

• H⁺ + OH⁻ → H₂O

• H₂S + 2OH⁻ → S²⁻ + 2H₂O

What is the net ionic equation for the reaction between hydroiodic acid and lithium hydroxide?

• HI + LiOH → LiI + H₂O

• H⁺ + OH⁻ → H₂O

• Li⁺ + I⁻ → LiI

• H⁺ + I⁻ + Li⁺ + OH⁻ → LiI + H₂O

What is the net ionic equation for the reaction between hydriodic acid and strontium hydroxide?

• Sr²⁺ + 2I⁻ → SrI₂

• Sr²⁺ + 2OH⁻ + 2H⁺ + 2I⁻ → 2H₂O + SrI₂

• H⁺ + OH⁻ → H₂O

• HI + Sr(OH)₂ → SrI₂ + H₂O