Featured in PASCO’s College Chemistry Instructor Guide
College Instructor edition with 36 experiments covering introductory and general chemistry topics.
Determination of Precipitate
Use a stainless steel temperature sensor with gravimetric analysis to determine the amount of sulfate in a sample of an unknown alkali sulfate.
In this activity, students use gravimetric analysis to determine the amount of sulfate in a sample of an unknown alkali sulfate.
Students gain experience conducting the following procedures:
- Isolating sulfate from an unknown sample by precipitation with barium chloride.
- Collecting, drying, and obtaining the mass of the precipitate.
- Calculating the amount of sulfate in the unknown from collected data.
Sensors / Equipment Used:
Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.
Ring stand with ring
Crucible with lid
Beaker, glass, 400-mL
Beaker, glass, 250-mL
Beaker, 25-mL - 3
Beaker or flask, 400-mL,
Graduated cylinder, 100-mL
Graduated cylinder, 10-mL
Buret, 50 mL
0.5 M Barium chloride (BaCl2) - 30 mL
0.1 M Silver nitrate (AgNO3) - 5 mL
6 M Hydrochloric acid (HCl) - 5 mL
Unknown alkali sulfate (use K2SO4 and Na2SO4) - 0.35 g
Filter paper, Whatman® Ashless, #42
Rubber policeman and stirring rod
Watch glass, 100-mm
Distilled water 100 mL
Wash bottle with distilled water
The Associated Bundle:
Contains the probeware for completing experiments in the College Chemistry lab manual.