QualitativeAnion Tests
Peter Jeschofnig, Ph.D. Version 42-0192-00-01
Lab Report Assistant
Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment’squestions,diagramsifneeded,anddatatables thatshouldbeaddressedinaformallabreport.Theintentistofacilitatestudents’writingoflab reports by providing this informationin an editable filewhich can be sent to an instructor.
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Observations
3
Questions
Classifyyourionsaccordingtothefollowingthreegroups.Severalofthecationsbelongtomore than one group.
Group 1: Anions that WILL NOTPRECIPITATE in the presence of silver nitrate.
Group 2: Anions that WILLPRECIPITATEinthepresenceofsilvernitrateandtheresulting precipitates WILL DISSOLVE upon acidificationwith nitric acid.
Group 3: Anions thatWILLPRECIPITATEinthepresenceofsilvernitrateandtheresulting precipitates WILL NOTDISSOLVE upon acidificationwith nitric acid.
A. Write a net ionic equationfor any reactionthat produces a precipitate.
B. Identifythe anions that produce gas upon additionof HCl.
C. Identifythe anions that do not precipitate with silver nitrate.
D. Identifytheanionsthatreactwithsilvernitratetoformprecipitatesthatdissolvewhen acidifiedwith nitric acid.
E. Identifytheanionsthatreactwithsilvernitratetoformprecipitatesthatdonotdissolvewhen acidifiedwith nitric acid.
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F. Whatsimpletest(otherthanaspecificconfirmationtest)woulddistinguishbetweenCO3
–
and NO3 ?
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