Introductory Chemistry Study Set 7

Given: Li + Hg₂I₂ → 2LiI + 2Hg The equation is a balanced reaction. Refer to the reaction below for True/False Questions 13-14. Given: Fe + MnO₄⁻  Fe³⁺ + Mn

When an oxidation number of an atom is increased in the course of a redox reaction, that atom is being reduced.

Given: Mo²⁺ + Br₂ → Mo³⁺ + 2Br⁻ The equation is a balanced reaction.

The phosphorous atom in H₃PO₄ is assigned an oxidation number of +5.

The fluorine atom in HF is assigned an oxidation number of +1.

If the reaction is taking place in an acidic solution, 6 moles of H₂O are required on the product side to balance the equation.

The sodium atom in NaOH is assigned an oxidation number of +1.

If the reaction is taking place in a basic solution the balanced equation of the reaction is 7Fe + 3MnO₄⁻  7Fe³⁺ + 3Mn + 24OH⁻ + 12H₂O.

When an oxidation number of an atom is decreased in the course of a redox reaction, that atom is being oxidized.

The calcium atom in Ca₃(PO₄)₂ is assigned an oxidation number of +3.

Given: O₂ + 2H₂O + I₂ → 4OH⁻ + 2I⁻ The equation is a balanced reaction.

The oxygen atom in O₂ is assigned an oxidation number of -1.

Given: Ru₂S₃ + O₂ → Ru₂O₃ + S The coefficient of Ru₂S₃ is 2 in the balanced chemical equation.

The value of E_1/2 for the half reaction O₂ + 4H⁺ + 4e⁻ → 2H₂O is 1.23 V.

Given: Na + I₂ → NaI The coefficient of Na is 2 in the balanced chemical equation.

Atoms in their elemental state are assigned an oxidation number of 0.

Given: Be + 2H⁺ → Be²⁺ + H₂ The equation is a balanced reaction.

The voltage of a voltaic cell based on the reaction O₂ + 4H⁺ + 4Cl⁻→ 2H₂O + 2Cl₂ is 0.15 V.

The value of E_1/2 for the half reaction Mn²⁺ + 4H₂O → MnO₄⁻ + 8H⁺ + 5e⁻ is 1.51 V.

The reaction taking place in the voltaic cell Ag⁺ + Fe²⁺ → Ag + Fe³⁺ is a nonspontaneous reaction.