Name: Date: Section: Prelaboratory Assignment: Qualitative Analysis Group III Cations 1. Prepare a complete flow chart for the procedure and put it on your data sheet.
Name: Date: Section: Prelaboratory Assignment: Qualitative Analysis Group III Cations 1. Prepare a complete flow chart for the procedure and put it on your data sheet.
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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![n
Name:
Prelaboratory Assignment:
Name:
Date:
Section:
Prelaboratory Assignment: Qualitative Analysis Group III Cations
1. Prepare a complete flow chart for the procedure and put it on your data sheet.
#10](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2704aedc-cd59-4651-b157-0d8c71ae74f0%2F0da8bb51-e03f-4fd6-bc32-188d8f147283%2F622h7ei_processed.jpeg&w=3840&q=75)
Transcribed Image Text:n
Name:
Prelaboratory Assignment:
Name:
Date:
Section:
Prelaboratory Assignment: Qualitative Analysis Group III Cations
1. Prepare a complete flow chart for the procedure and put it on your data sheet.
#10
![Section:
Cations
#9
Name:
.
Prelaboratory Assignment.
Date:
QUALITATIVE ANALYSIS OF GROUP III CATIONS
Qualitative analysis is a method for identifying the elements
present in a unknown mixture.
For this purpose, metal cations are broadly classified into three
groups based upon their solubilities.
-The group I cations, Pb2+, Ag+, and Hg, are those which form
insoluble chlorides.
-Group II cations, Cu2+, Bi, Hg2+, Cd2+, Sn4+, and Sb2+ form
insoluble sulfides below pH 0.5
-Group III cations, Al, Cr, Co, Fe, Mn, Ni, and Zn²+,
form insoluble sulfides above pH9.
group IV cations, Ba 2+, Ca2+, Mg2+, Na+, K+, and NH4+, are the
remaining common cations. The
alkaline earth members of this group form insoluble carbonates
while the alkaline elements are
identified by flame tests. The ammonium ion is detected by a
litmus test.
These groups are easily separated by their markedly different
solubilities. Separating the
cations within a given group is more difficult but based upon the
same principle, as will be shown in the experimental section.
NOTE: THE GROUPS USED FOR QUANTITATIVE
ANALYSIS ARE SOLELY
BASED ON SOLUBILITY. THEY DO NOT IN ANY WAY
CORRESPOND TO THE
GROUPS OF THE PERIODIC TABLE.
group III cations, Al*, Cr", Fe, Ni²+
#10](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2704aedc-cd59-4651-b157-0d8c71ae74f0%2F0da8bb51-e03f-4fd6-bc32-188d8f147283%2F3m60295_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Section:
Cations
#9
Name:
.
Prelaboratory Assignment.
Date:
QUALITATIVE ANALYSIS OF GROUP III CATIONS
Qualitative analysis is a method for identifying the elements
present in a unknown mixture.
For this purpose, metal cations are broadly classified into three
groups based upon their solubilities.
-The group I cations, Pb2+, Ag+, and Hg, are those which form
insoluble chlorides.
-Group II cations, Cu2+, Bi, Hg2+, Cd2+, Sn4+, and Sb2+ form
insoluble sulfides below pH 0.5
-Group III cations, Al, Cr, Co, Fe, Mn, Ni, and Zn²+,
form insoluble sulfides above pH9.
group IV cations, Ba 2+, Ca2+, Mg2+, Na+, K+, and NH4+, are the
remaining common cations. The
alkaline earth members of this group form insoluble carbonates
while the alkaline elements are
identified by flame tests. The ammonium ion is detected by a
litmus test.
These groups are easily separated by their markedly different
solubilities. Separating the
cations within a given group is more difficult but based upon the
same principle, as will be shown in the experimental section.
NOTE: THE GROUPS USED FOR QUANTITATIVE
ANALYSIS ARE SOLELY
BASED ON SOLUBILITY. THEY DO NOT IN ANY WAY
CORRESPOND TO THE
GROUPS OF THE PERIODIC TABLE.
group III cations, Al*, Cr", Fe, Ni²+
#10
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