Which of the following equations is the balanced reduction half reaction for Ag+(aq) + Fe(s) → Fe2+(aq) + Ag(s)?

What is the oxidation of a pure element?

Predict whether the equivalence point for a titration of NH3 with HCl will be above, below, or at pH 7.0.

A voltaic cell that uses the reaction Ti3+(aq) + 2 Cr2+(aq) → Ti+(aq) + 2 Cr3+(aq) measures a standard cell potential of 1.19 V. With Eredo = 0.41 V for Cr3+(aq) + e- → Cr2+(aq), calculate the Eredo for the reduction of Ti3+(aq) to Ti+(aq).

In the reaction I2O3(s) + 5CO(g) → I2(s) + 5CO2(g), which element undergoes a change of 2 in its oxidation number (could be +2 or -2)?

For a saturated solution of Co(OH)2, what happens when a strong acid is added?

Assuming standard conditions, arrange the following in order of increasing strength as oxidizing agents in acidic solution: Cu2+, Cl2, O2.

For the following reaction, Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s), calculate the emf at 25 °C with a = 0.025 M and = 0.50 M given the E° = 1.1 V, R = 8.314 J/K-mol, and F = 96,485 J/V-mol.

A solution contains three anions with the following concentrations: 0.20 M CrO42–, 0.10 M CO32–, and 0.010 M Cl–. If a dilute AgNO3 solution is slowly added to the solution, what is the first compound to precipitate: Ag2CrO4 (Ksp = 1.2 × 10–12), Ag2CO3 (Ksp = 8.1 × 10–12), or AgCl (Ksp = 1.8 × 10–10)?

A reaction can only be spontaneous if which of the following conditions are true?