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abbreviated qualitative analysis scheme report sheet
REPORT SHEETEXPERIMENT lab#12 32 Qualitative Analysis Scheme PART I: GROUP 1 CATIONS Record the rcagent used in each scp, your observations, and the equations for each precipitation reacticr Mark (+) fobserverd in unknown Procedure Reagewr Oervations G1-1 Equarions G1-3 Cations in group I unknown 499 Copyright © 2015 Pearson Edacatim, Inc.
Expert Answer
GI -1: Silver ion (Ag+)
Reagent: NaOH
Observation: A fine black or dark brown ppt forms on adding NaOH, which doesn’t dissolve in excess NaOH.
Equation: 2Ag+(aq) + 2OH–(aq) Ag2O(s) + H2O(l)
GI -2: Lead ion (Pb2+)
Reagent: NaOH
Observation: A white ppt forms upon adding NaOH, which dissolves in excess NaOH.
Equation: Pb2+(aq) + 2OH–(aq) Pb(OH)2(s)
Pb(OH)2(s) + 2OH–(aq) [Pb(OH)4]2-(aq)
GI-3: Mercurous ion (Hg22+)
Reagent: NaOH
Observation: A fine black ppt and a yellow ppt form on adding NaOH.
Equation: Hg22+ + 2OH– Hg(l) + HgO(s) + H2O
