A. CATION ANALYSIS

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Last updated 11:07 AM on 7/8/26
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22 Terms

1
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a. Group I

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The cation group that precipitates with dilute HCl

a. Group I
b. Group II
c. Group IV
d. Group III

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d. Insoluble chlorides

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The name of Cation Group I

a. Acid-insoluble sulfides
b. Insoluble carbonates
c. Soluble group
d. Insoluble chlorides

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c. Pb²⁺, Hg₂²⁺, Ag⁺

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The members of Cation Group I

a. Sb³⁺, Sn²⁺, As³⁻
b. Al³⁺, Fe³⁺, Mn²⁺
c. Pb²⁺, Hg₂²⁺, Ag⁺
d. Ba²⁺, Ca²⁺, Sr²⁺

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Pb²⁺, Hg₂²⁺, Ag⁺

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The members of Cation Group I

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b. Group II

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The cation group that precipitates with H2S

a. Group IV
b. Group II
c. Group III
d. Group I

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b. Group II

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The cation group that doesn’t precipitate with HCl

a. Group IV
b. Group II
c. Group III
d. Group I

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b. Hydrogen sulfide group
d. Acid-insoluble sulfides

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The name of Cation Group II

(multiple answers)

a. Insoluble chlorides
b. Hydrogen sulfide group
c. Insoluble carbonates
d. Acid-insoluble sulfides

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Sb³⁺, Sb5⁺, As³+, As5⁺, Bi³⁺, Cd²⁺, Cu²⁺, Hg²⁺, Sn²⁺, Sn4

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The members of Cation Group II

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d. Group III

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The cation group that does not precipitate with HCl or H2S but precipitates with (NH4)2S

a. Group I
b. Group IV
c. Group II
d. Group III

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a. Ammonium sulfide group
d. Base-insoluble sulfides

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The name of Cation Group III

(Multiple Answers)

a. Ammonium sulfide group
b. Insoluble carbonates and phosphates
c. Acid-insoluble sulfides
d. Base-insoluble sulfides

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Al³⁺, Co³⁺, Cr³⁺, Fe²⁺, Fe3+, Mn²⁺, Ni²⁺, Zn²⁺

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The members of Cation Group III

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d. Group IV

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The cation group that precipitates with (NH4)2CO3 or (NH4)2HPO4

a. Group II
b. Group V
c. Group III
d. Group IV

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d. Group IV

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The cation group that doesn’t precipitate with HCl, H2S & (NH4)2S

a. Group II
b. Group V
c. Group III
d. Group IV

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b. Insoluble phosphates
d. Insoluble carbonates

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The name of Cation Group IV

(Multiple answers)

a. Acid-insoluble sulfides
b. Insoluble phosphates
c. Base-insoluble sulfides
d. Insoluble carbonates

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a. Ba²⁺, Ca²⁺, Sr²⁺

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The members of Cation Group IV

a. Ba²⁺, Ca²⁺, Sr²⁺
b. NH4⁺, Li⁺, Mg²⁺, K⁺, Na⁺
c. Pb²⁺, Hg₂²⁺, Ag⁺
d. Al³⁺, Fe³⁺, Mn²⁺

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d. Group V

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The cation group that does not precipitate with any reagent in the previous groups and stays soluble

a. Group II
b. Group IV
c. Group III
d. Group V

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a. Soluble group

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The name of Cation Group V

a. Soluble group
b. Acid-insoluble sulfides
c. Insoluble carbonates
d. Insoluble chlorides

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d. NH4⁺, Li⁺, Mg²⁺, K⁺, Na⁺

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The members of Cation Group V

a. Ba²⁺, Ca²⁺, Sr²⁺
b. Al³⁺, Fe³⁺, Mn²⁺
c. Pb²⁺, Hg₂²⁺, Ag⁺
d. NH4⁺, Li⁺, Mg²⁺, K⁺, Na⁺

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d. HCl

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The reagent added first in systematic Cation Analysis to precipitate Group I cations

a. H2S and HCl
b. (NH4)2S at pH 8
c. (NH4)2HPO4 or (NH4)2CO3
d. HCl

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b. H2S and HCl

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The reagent added to remaining cations after Group I separation to precipitate Group II cations

a. (NH4)2S at pH 8
b. H2S and HCl
c. HCl
d. (NH4)2CO3

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d. (NH4)2S at pH 8

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The reagent added to remaining cations after Group II separation to precipitate Group III cations

a. H2S and HCl
b. HCl
c. (NH4)2HPO4 or (NH4)2CO3
d. (NH4)2S at pH 8

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a. (NH4)2CO3

b. (NH4)2HPO4

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The reagents added to remaining cations after Group III separation to precipitate Group IV cations

(multiple answers)

a. NH4)2CO3
b. (NH4)2HPO4
c. (NH4)2S at pH 8
d. H2S