CHEMISTRY 1112

Review Quiz 3

Summer Session II 2002
 ________________________________________________________________________

1. If 3.0 mL of 0.30 M KI is mixed with 2.0 mL of deionized water, 1.0 mL of buffer solution, 1.0 mL of 0.02 M Na₂S₂O₃ and 3.0 mL of H₂O₂ with is the initial molar concentration of I^- ( at time = ), before reaction)?

2. How can Bi³⁺ ions be separated from Ag⁺ ions?

3. When NH₃ (aq) is added to a white precipitate, the precipitate dissolves. What is the precipitate?

4. Identify a single reagent or technique that separates:
   1. Ag⁺ from Cu²⁺   ______________
   2. Ag⁺ from Na⁺     ______________
   3. NH₄⁺ from Cu²⁺ _{____________________}

5. Identify a reagent that separates
   1. Al³⁺ from Fe³⁺   ____________
   2. Fe³⁺ from Ni²⁺   ____________

6. What is the color of each of the following?
   1. [Ni(NH₃)₆]²⁺__________________
   2. [FeNCS]²⁺   __________________