DRAFT: This module has unpublished changes.
DRAFT: This module has unpublished changes.

DRAFT: This module has unpublished changes.
Procedure Observation Proposed Equations Identified Cations
1 -The Litmus paper did not turn blue (No Ammonia).  

X+OH=XOH (aq)

  

Ag+,Pb2+,Ni2+, Mn2+,Fe+,NH+4   
2

-Had to add 20 drops of HCl to stop formation of the precipitate.

-After centrifuging the solution, no precipitate formed.

  

X+CL=XCL

  

AgCl, PbCl2
3 -The precipitate turned clear after water was added, and remained clear after centerfuging.  

XCl+H2O=XCL

  

AgCl
4 -After adding HCl, a precipitate formed, and the litmus paper turned red, indicating that the solution was acidic.  

AgCl+NH3= Cl+ Ag Ag(NH3)2                                                           

  

AgCl
5

-When adding H2SO4, the precipitate remained clear.

-When adding K2CrO4, the precipitate turned slightly yellow.

-No precipitates were formed.

  No Reaction  

No Pb2+
6 -This procedure was not performed, because no precipitate was formed in Procedure 2.  No Reaction  Al3+
7 -This procedure was not performed, because no precipitate was formed in Procedure 6.  No Reaction  
8 -This procedure was not performed, because no precipitate was formed in Procedure 6.  No Reaction  
9 -This procedure was not performed, because no precipitate was formed in Procedure 6.  No Reaction  
10 -This procedure was not performed, because no precipitate was formed in Procedure 6.  No Reaction  
11 -The Litmus paper turned slightly red after adding H2SO4, indicating slight acidity.  No Reaction  Al3+
12 - The procedure was not performed, because aluminon dye was unavailable.  

NaOH + H2SO4 = H2O + Na + SO42+

  No Al3+
DRAFT: This module has unpublished changes.
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