Answered: Mn2+, Fe+, Al3+, Zn?+, Cr*, Co2+, Ni?+…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

You are given a test tube that may contain Mn2+, Fe3+, Zn2+, Cr3+, Co2+, Ni2+, Al3+

DMG is dimethyl gloxamine, and TAA is thioacetamide.

Since the solution has a green cast to it you highly suspect it contains nickel ion, outline the steps you would take to confirm this AND why you added a chemical (to help it dissolve, to help it precipitate, filter to separate it and what part will you keep? The solid or the solution?)

Skip steps that don't help with the nickel idea you have going.

Mn2+, Fe+, Al3+, Zn?+, Cr*, Co2+, Ni?+
Group III Cations
NH,C1, NH, & TAA
Fes. Al(OH),. ZnS, MnS. Cr(OH),. CoS. NiS
HCі
Fe*, Al3+, Zn2*, Mn2", Cr*, Ni?*
CoS, NiS
HCl, HNO,
Fe(OH),, MnO,. Ni(OH),
H,O, + NaOH
6.
H,SO,
Cr0,, Al(OH), . Zn(OH),
Co2+, Ni?+
MnO,
Fe3+, Ni2+
HNO, + NH,
12
H,SO,
Н,о,
NH,SCN
10
NH3
11
Cro,?, Zn(NH,),2+
DMG
Al(OH),
DMG
KSCN
Mn?
Co(SCN),2
blue
14 BaCl,
HNO,
13 aluminon
NIC,H,,N,0,
NiC,H,,N,O,
red
red
FeSCN?+
NH,
HNO,
NaBio,
red
ВаСтО,
Zn(NH,),"
Al(OH),
red lake
15
HNO,
Mno,
purple
K,Fe(CN), 16
Cr,0,2-
K,Zn,[Fe(CN),],
white-light green
Н.о,
Cro,
blue

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