Question

1. A sample solution is given to you that may contain any or all of the following ions: Ag+ , Ba2+, and Fe3+. In an attempt to determine which cations(s) are present, you add the following solutions. You found that no precipitate formed when either an aqueous solution of NaCl or an aqueous solution of Na2SO4 was added to the sample solution of NaOH. Which cation or cations are present in the sample? Give your reasoning

2. Balance the following redox reactions. Identify the oxidizing and reducing agents, and the substances oxidized and reduced.

(a) C₂O₄^2-(aq) + MnO₄^-(aq) ---> CO₂(g) + MnO₂(s) in basic solution

(b) Fe²⁺(aq) + MnO₄^-(aq) ---> Mn²⁺(aq) + Fe³⁺(aq) in acidic ​solution

Answer 1