Kit of rock alteration ions

Concentrations are studied to observe the formation of a precipitate in an aqueous solution.
The kit allows for conducting tests 10 times for the following ions: Fe²⁺, Fe³⁺, Cl^-, SO₄^2-, and Ca²⁺.
The reagents used for these reactions are sodium hydroxide (Na⁺, HO^-)aq, silver nitrate (Ag⁺, NO₃^-)aq, barium chloride (Ba⁺, Cl^-), and ammonium oxalate monohydrate [(NH₄⁺)₂,C₂O₄^2-]aq.
 
Format: 10 tests / ions
Experiment Duration: 30 min
Storage Duration: 12 months
Storage Condition: Room temperature

The kit consists of 9 dropper bottles containing:
- 30 ml of iron II sulfate (Fe2+)
- 30 ml of iron III sulfate (Fe3+)
- 30 ml of silver nitrate (Ag+, NO3-)aq
- 30 ml of sodium chloride (NaCl)
- 30 ml of sodium sulfate (Na2SO4)
- 30 ml of calcium chloride (CaCl)
- 10 ml of ammonium oxalate ((NH4+)2, C2O4²-)aq
- 10 ml of barium chloride (Ba, Cl-)
- 60 ml of sodium hydroxide (lye)