Featured in PASCO’s College Chemistry Instructor Guide

College Chemistry Instructor Guide

(PS-3803A)

College Instructor edition with 36 experiments covering introductory and general chemistry topics.

Analysis of Anions

Lab Summary

Use chemical reactions and chemical properties to analyze solutions of known anions, using the results to analyze a solution of unknown anions.

Theory

Students analyze solutions of known anions and apply the knowledge gained to identify the anions in an unknown solution.

Method

Students gain experience conducting the following procedures:

  • Comparing the results of test tube reactions of known anions with the results of the solution containing unknown anions.
  • Performing basic laboratory separation processes.

Materials Used:

Test tube, 10-mL - 13
Test tube rack 
Pipets, 1 mL, disposable - 13
Stirring rods - 5
Litmus paper - 15
0.2 M Sodium sulfate (Na2SO4) -10 mL
0.2 M Monopotassium phosphate (KH2PO4) - 5 mL
0.2 M Sodium nitrate (NaNO3) -5 mL
0.2 M Sodium chloride (NaCl) - 5 mL
Unknown anion solution (use Na2SO4, KH2PO4, NaNO3, NaCl) - 20 mL
0.2 M Barium nitrate (Ba(NO3)2) - 5 mL
Saturated iron(II) sulfate (FeSO4) - 2 mL
0.1 M Silver nitrate (AgNO3) - 5 mL
6 M Nitric acid (HNO3) - 5 mL
5 M Ammonia (NH3) - 5 mL
3 M Sulfuric acid (H2SO4) - 5 mL
Concentrated H2SO4 - 2 mL
Distilled water - 10 mL
Centrifuge 
Marking pen 

The Associated Bundle:

Advanced Chemistry Standard Sensor Bundle

(PS-2928A)

Contains the probeware for completing experiments in the College Chemistry lab manual.

Interface Required

This experiment may require software and an interface for data collection.