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Analytical Chemistry > Chem Lab Midterm > Flashcards

Chem Lab Midterm Flashcards

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0
Q

Anion Group #1 precipitating agent

A

Calcium Acetate Ca(Ac)2

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1
Q

Negatively charged ions produced by the ionization of salts and acids

A

Anions

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2
Q 
#1
Produces vigorous effervescence
A

Carbonate HCO3

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3
Q 
#1
White precipitate
A

Sulfite

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4
Q

Added to Oxalate to make the pink color disappear

A

KMnO4

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5
Q

Arsenite + thioacetamide =

A

Yellow precipitate

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6
Q

Arsenate + KI

A

Brown solution

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7
Q

Added to phosphate that creates a yellow precipitate

A

Ammonium molybdate

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8
Q 
Name the reagents of the following Group 1 anions:
Carbonate 
Fluoride 
Sulfite 
Oxalate 
Arsenate
Arsenite
Phosphate
A 
KClO3
H2SO4
H2O2
KMnO4
KI
Thioacetamide 
Ammonium molybdate
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9
Q 
What happens to these Group #1 anions when their reagents are added?
•HCO3
•F
•SO3
• C2O4
•AsO3
•AsO4
•PO4
A
  • vigorous effervescence
  • etching of glass
  • white ppt
  • disappearance of pink color
  • yellow precipitate
  • brown solution color
  • yellow precipitate
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10
Q

Anion Group #2 precipitating agent

A

Barium Acetate Ba(Ac)2

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11
Q

What will happen to the following Group #2 anions when their reagents are added?
• SO4
•CrO4

A
  • white precipitate

* yellow precipitate

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12
Q

What are the reagents added to the following Group #2 anions?
• SO4
• CrO4

A
  • HCl

* NaAc

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13
Q

Precipitating agent of Group #3 anions

A

Cadmium Acetate Cd(Ac)2

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14
Q

What are the reagents added to the following group #3 anions?
• Sulfide
•Ferrocyanide
• Ferricyanide

A
  • Pb(Ac)2
  • Ferrous Sulfate Crystals
  • FeCl2
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15
Q

What happens to the following Group #3 anions when their reagents are added?
• Sulfide
• Ferricyanide
• Ferrocyanide

A
  • Brown/ Black coloration of filter paper
  • Dark Blue Precipitate
  • Dark Blue precipitate
16
Q

What is the precipitating agent of Group #4 anions?

A

Ag(Ac)2

17
Q

What happens to the following Group #4 anions when their reagents are added?
• Thiocyanate
• Chloride
• Thiosulfate

A
  • red coloration
  • white precipitate
  • white-yellow-orange-brown-black precipitate
18
Q

What are the reagents of the following Group# 4 anions?
• SCN
•Cl
•S2O3

A
  • FeCl2
  • HNO3
  • HNO3
19
Q

What is the precipitating agent of Group #5 anions?

A

NONE

20
Q 
What are the reagents added to the following Group #5 anions?
• Chlorate
•Nitrite
•Nitrate
•Borate
• Iodide
A 
•NaNo2
• Urea in HCl
• a-naphthylamine
  H2SO4
• Carminic Acid
• NaNo3
21
Q 
What happens to the following  Group #5 anions when their reagents are added?
• ClO3
•NO2
•NO3
• BO3
• I
A
  • white precipitate
  • vigorous gas evolution
  • purple ring
  • brown ring
  • red-bluish violet
  • violet color in CCl4
22
Q

What are the Group #2 anions?

A

Sulfate

Chromate

23
Q

What are the group #4 anions?

A

Thiocyanate
Chloride
Thiosulfate

24
Q

What are the Group #3 anions?

A

Sulfide
Ferrocyanide
Ferricyanide

25
Q

What are the Group#1 anions?

A 
Carbonate
Fluoride 
Sulfite
Oxalate 
Phosphate 
Arsenate
Arsenite
26
Q

What are the Group#5 anions?

A 
Chlorate
Nitrite
Nitrate
Borate
Iodide

Analytical Chemistry (3 decks)

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