IDENTIFICATION OF
GROUP 1 CATION
QUALITATIVE ANALYSIS GROUP 1 CATION
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In this experiment, we’ll analyze the an unknown solution using qualitative
techniques to determine whether the solution contains (Ag+, Hg22+, Pb2+).
There are three solutions that are A, B and C
Reagent : HCl 6M, NH3 0,5M, HNO3 1M, K2CrO4 0,1 M.
Tools : Test tube, Beaker glass, Hotplate, Vortex or centrifuge, drop
pippete,
Identify what the cation of A, B and C solution!
Send the results to the mailing adress “adawiah@uinjkt.ac.id” with the
subject “1st assignment of qualitative analysis 1”
Solution containing Group I = (A, B, and C)
Step I
Add HCl(aq) 6M, centrifuge and decant
White precipitate of Group
1 Cations A, B and C
Solution to be
discarded
Step II
Add Hot water, centrifuge, decant
Solution
containing A
White precipitate of
B and C
Step IV
Add NH3(aq) 0,5M excess, centrifuge and decant
Step III
Add K2CrO4
Yellow
precipitate of
ACrO4
Grey precipitate
confirm C
Solution containing B
Step V
Add HNO3(aq) 1M, centrifuge and decant
White precipitate confirm
B
THANK YOU