Complete the statements about the redox reaction below. 2Au*(aq) + 3Cd(s) → 2Au(s) + 3Cd²*(aq) Half-reactions: Au3+(aq) + 3e- Au(s) E° = +1.50 V Cd2*(aq) + 2e → Cd(s) E° = -0.40 V 4 Aus"(aq) is being oxidized. voltaic is being reduced. 6. Au(s) is acting as an reducing agent. 3 5 is acting as an oxidizing agent. 2 Cd* (aq) moles of electrons are transferred. electrolytic Cd(s) The reaction is a(n) cell.

Aqua regia, a mixture of concentrated HNO3 and HCl, was developed by alchemists to “dissolve” gold. The process is a redox reaction with the following simplified skeleton reaction: Au(s) + NO3- (aq) + Cl- (aq) AuCl-4 (aq) + NO2 (g) (a) Balance the reaction by the half- reaction method (b) What is the oxidizing and reducing agents? (c) What is the function of HCl in aqua regia?

Balance the following redox reaction in basic solution. H2(g)+Cl₂(9) H2O(l)+Cl (aq) H2(g) + C₁₂ (g) → H₂O(l) + Cl¯ (aq) - ローロ ☑

+ 1.14 V TI Pt Cr3+ (1 M) Cr2 (1 M) T13+ (1 M) T13+ (aq) + 3e-→ TI (s) Cr2+ (aq) → Cr3+ (aq) + e- What happens to the thallium electrode as the redox reaction progresses? O it gains mass as thallium metal is plated onto the electrode O it loses mass as the thallium metal is consumed by the reaction O it spontaneously ignites and burns O the thallium electrode is inert and unaffected by the redox reaction O a thick layer of thallium salt develops on the clectrode DELL