After adding 6M HCl to the unknown solution, the resulting solid is separated from the liquid. Hot water is next added to the solid. Not mixing the solid real well with the hot water could result in false-positive results for which ion(s)? Hg,2+, Ag*, Pb2*, K*, Ca2", AP+Add 6M HCI(until ppt is complete)pptsolutionHg2Cl2, AgCI, PbCl2(white), (white), (white)K+, Ca2+, Al3+Extract ppt with hot H,O(3 times, 1 mL per time)Continue analysis for Kt, Ca2+, AP+ppthot H,OHg2Cl2, AgCIPb2+(white), (white)Add 1M K2CrO43M NH(10 drops)(6 or 7 drops)cool in ice-bathPbCrO4(yellow solid)pptsolution+[Ag{NH),j*(black), (white)(colorless)6M HNO3(until acidic)AgCl(white solid)

The question is based on the concept of qualitative analysis. We have to identify the error which…

After adding 6M HCl to the unknown solution, the resulting solid is separated from the liquid. Hot water is next added to the solid. Not mixing the solid real well with the hot water could result in false-positive results for which ion(s)?

After adding 6M HCl to the unknown solution, the resulting solid is separated from the liquid. Hot water is next added to the solid. Not mixing the solid real well with the hot water could result in false-positive results for which ion(s)?

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter14: Chromatography

Section: Chapter Questions

Problem 1P

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Question

Hg,2+, Ag*, Pb2*, K*, Ca2", AP+
Add 6M HCI
(until ppt is complete)
ppt
solution
Hg2Cl2, AgCI, PbCl2
(white), (white), (white)
K+, Ca2+, Al3+
Extract ppt with hot H,O
(3 times, 1 mL per time)
Continue analysis for Kt, Ca2+, AP+
ppt
hot H,O
Hg2Cl2, AgCI
Pb2+
(white), (white)
Add 1M K2CrO4
3M NH
(10 drops)
(6 or 7 drops)
cool in ice-bath
PbCrO4
(yellow solid)
ppt
solution
+
[Ag{NH),j*
(black), (white)
(colorless)
6M HNO3
(until acidic)
AgCl
(white solid)

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