Qualitative Anion Tests

Peter Jeschofnig, Ph.D. Version 42-0192-00-01

Lab RepoRt assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiments questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Data Table: Qualitative Anion TestsNameTest Tube 1w/HClTest Tube 2 w/AgNO3w/HNOTest Tube 3ConfirmationBromideCarbonateChlorideIodinePhosphateSulfateSulfideUnknownobseRvations

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ExperimentQualitative anion tests

146Hands-On Labs, Inc.www.LabPaq.com

Questions

Classify your ions according to the following three groups. Several of the cations belong to more than one group.

Group 1: Anions that WILL NOT PRECIPITATE in the presence of silver nitrate.

Group 2: Anions that WILL PRECIPITATE in the presence of silver nitrate and the resulting precipitates WILL DISSOLVE upon acidification with nitric acid.

Group 3: Anions that WILL PRECIPITATE in the presence of silver nitrate and the resulting precipitates WILL NOT DISSOLVE upon acidification with nitric acid.

A. Write a net ionic equation for any reaction that produces a precipitate.

B. Identify the anions that produce gas upon addition of HCl.

C. Identify the anions that do not precipitate with silver nitrate.

D. Identify the anions that react with silver nitrate to form precipitates that dissolve when acidified with nitric acid.

E. Identify the anions that react with silver nitrate to form precipitates that do not dissolve when acidified with nitric acid.

2-F.What simple test (other than a specific confirmation test) would distinguish between CO3-and NO3 ?