Featured in PASCO’s College Chemistry Instructor Guide
College Instructor edition with 36 experiments covering introductory and general chemistry topics.
Use chemical reactions and chemical properties to identify the cations present in a mixture by systematically reacting the unknown with various reagents.
Students use chemical properties to qualitatively classify and identify the cations present in a solution.
Students gain experience conducting the following procedures:
Test tube, 10-mL - 10
Test tube rack
Pipet, graduated, 10-mL
Pipet, plastic, 1-mL - 7
Litmus paper - 10
pH paper - 1 roll
6 M Sodium hydroxide (NaOH) - 20 mL
6 M Ammonia (NH3) - 20 mL
0.1 M Potassium chromate (K2CrO4) - 20 mL
1% Aluminon dye- 2 mL
6 M Hydrochloric acid (HCl) - 20 mL
Dimethylglyoxime (DMG) reagent - 5 drops
0.2 M Potassium ferrocyanide (K4[Fe(CN)6]) - 2 mL
3 M Sulfuric acid (H2SO4) - 3 mL
3 % Hydrogen peroxide (H2O2) - 2 mL
Unknown cation solution (use AlCl3, NiCl3, Pb(NO3)2, AgNO3, MnSO4, (NH4)2Fe(SO4)2) - 20 mL
Deionized water - 5 mL
This experiment may require software and an interface for data collection.