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[1ST YEAR] PH 105 - Pharmaceutical Analysis I (Lec) > FINAL 01 - Volumetric Precipitimetry > Flashcards

FINAL 01 - Volumetric Precipitimetry Flashcards

1
Q

These are a class of reactions that deal with the formation of relatively insoluble substances

A

Volumetric precipitimetry

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2
Q

Used in official volumetric precipitation assays

A

Adsorption indicators

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3
Q

Used both in direct and residual titrations employing standard ammonium thiocyanate solution

A

Ferric alum

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4
Q

Used in the analysis of chloride (and other halides)

A

Potassium chromate

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5
Q

Is the product of the concentration of ions in a solution

A

Ksp

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6
Q

Method based on the cessation of precipitation

A

Gay-Lussac method

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7
Q

Type of titration - Gay-Lussac Method

A

Direct titration

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8
Q

Titrant - Gay-Lussac Method

A

Silver nitrate VS

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9
Q

Analyte - Gay-Lussac Method

A

Halides

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10
Q

Indicator - Gay-Lussac method

A

None

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11
Q

Endpoint - Gay-Lussac method

A

Cessation of precipitate

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12
Q

Species responsible for endpoint - Gay-Lussac Method

A

Silver halide

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13
Q

Method based on the formation of a second highly colored precipitate

A

Mohr method

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14
Q

Type of titration - Mohr method

A

Direct titration

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15
Q

Titrant - Mohr method

A

Silver nitrate VS

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16
Q

Analyte - Mohr method

A

Halides (except for iodide)

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17
Q

Indicator - Mohr method

A

Potassium chromate

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18
Q

Endpoint - Mohr method

A

Red precipitate

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19
Q

Species responsible for endpoint - Mohr method

A

Silver chromate

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20
Q

Required pH condition - Mohr method

A

pH 8

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21
Q

Method based on the formation of a soluble, colored complex

A

Volhard method

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22
Q

Type of titration - Volhard method (residual)

A

Residual titration

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23
Q

Excess titrant - Volhard method (residual)

A

Silver nitrate VS

24
Q

Backtitrant - Volhard method (residual)

A

Ammonium thiocyanate VS

25
Analyte - Volhard method (residual)
Halides
26
Indicator - Volhard method (residual)
Ferric ammonium sulfate/Ferric alum
27
Endpoint - Volhard method (residual)
Red-brown color precipitate
28
Species responsible for endpoint - Volhard method (residual)
Ferric thiocyanate
29
Type of titration - Volhard method (direct)
Direct titration
30
Titrant - Volhard method (direct)
Ammonium thiocyanate VS
31
Analyte - Volhard method (direct)
Mercury (Hg) compounds
32
Indicator - Volhard method (direct)
Ferric ammonium sulfate/Ferric alum
33
Endpoint - Volhard method (direct)
Red-brown color precipitate
34
Species responsible for endpoint - Volhard method (direct)
Ferric thiocyanate
35
Method based on the appearance of turbidity
Liebig method
36
Type of titration - Liebig method
Direct titration
37
Titrant - Liebig method
Silver nitrate VS
38
Analyte - Liebig method
Cyanides
39
Indicator - Liebig method
None
40
Endpoint - Liebig method
Turbidity appears
41
Species responsible for endpoint - Liebig method
Silver cyanoargentate
42
Modification to the Liebig method; involves the addition of NH3 in the solution
Modified Liebig's method/Denige's modification
43
Type of titration - Modified Liebig method
Direct titration
44
Titrant - Modified Liebig method
Silver nitrate VS
45
Analyte - Modified Liebig method
Cyanides
46
Indicator - Modified Liebig method
Ammonia, Potassium iodide
47
Endpoint - Modified Liebig method
Yellow color precipitate
48
Species responsible for endpoint - Modified Liebig method
Silver iodide
49
Method based on the absorption of the indicator on the surface of the precipitate
Fajan method
50
Type of titration - Fajan method
Direct titration
51
Titrant - Fajan method
Silver nitrate VS
52
Analyte - Fajan method
Halides
53
Indicator - Fajan method
Adsorption indicator
54
Endpoint - Fajan method
Pink color
55
Species responsible for endpoint - Fajan method
Silver halide w/ indicator

[1ST YEAR] PH 105 - Pharmaceutical Analysis I (Lec) (12 decks)

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