QualitativeAnion Tests   Peter Jeschofnig, Ph.D. Version 42-0192-00-01       Lab Report Assistant                                                                                                 Thisdocumentisnotmeanttobeasubstitute foraformalla

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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.

 

 

 

Data Table: QualitativeAnion Tests

 

Name

Test Tube 1

w/HCl

Test Tube 2 w/AgNO3

 

w/HNO

Test Tube 3

Confirmation

 

Bromide

 

 

 

 

 

Carbonate

 

 

 

 

 

Chloride

 

 

 

 

 

Iodine

 

 

 

 

 

Phosphate

 

 

 

 

 

Sulfate

 

 

 

 

 

Sulfide

 

 

 

 

 

Unknown

 

 

 

 

 

 
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.

 

 

 

 

 

 

 

 

2-

 

F.    Whatsimpletest(otherthanaspecificconfirmationtest)woulddistinguishbetweenCO3

-

 

and NO3   ?

 

    • 12 years ago
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