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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
Q

Analyte - Volhard method (residual)

26
Q

Indicator - Volhard method (residual)

A

Ferric ammonium sulfate/Ferric alum

27
Q

Endpoint - Volhard method (residual)

A

Red-brown color precipitate

28
Q

Species responsible for endpoint - Volhard method (residual)

A

Ferric thiocyanate

29
Q

Type of titration - Volhard method (direct)

A

Direct titration

30
Q

Titrant - Volhard method (direct)

A

Ammonium thiocyanate VS

31
Q

Analyte - Volhard method (direct)

A

Mercury (Hg) compounds

32
Q

Indicator - Volhard method (direct)

A

Ferric ammonium sulfate/Ferric alum

33
Q

Endpoint - Volhard method (direct)

A

Red-brown color precipitate

34
Q

Species responsible for endpoint - Volhard method (direct)

A

Ferric thiocyanate

35
Q

Method based on the appearance of turbidity

A

Liebig method

36
Q

Type of titration - Liebig method

A

Direct titration

37
Q

Titrant - Liebig method

A

Silver nitrate VS

38
Q

Analyte - Liebig method

39
Q

Indicator - Liebig method

40
Q

Endpoint - Liebig method

A

Turbidity appears

41
Q

Species responsible for endpoint - Liebig method

A

Silver cyanoargentate

42
Q

Modification to the Liebig method; involves the addition of NH3 in the solution

A

Modified Liebig’s method/Denige’s modification

43
Q

Type of titration - Modified Liebig method

A

Direct titration

44
Q

Titrant - Modified Liebig method

A

Silver nitrate VS

45
Q

Analyte - Modified Liebig method

46
Q

Indicator - Modified Liebig method

A

Ammonia, Potassium iodide

47
Q

Endpoint - Modified Liebig method

A

Yellow color precipitate

48
Q

Species responsible for endpoint - Modified Liebig method

A

Silver iodide

49
Q

Method based on the absorption of the indicator on the surface of the precipitate

A

Fajan method

50
Q

Type of titration - Fajan method

A

Direct titration

51
Q

Titrant - Fajan method

A

Silver nitrate VS

52
Q

Analyte - Fajan method

53
Q

Indicator - Fajan method

A

Adsorption indicator

54
Q

Endpoint - Fajan method

A

Pink color

55
Q

Species responsible for endpoint - Fajan method

A

Silver halide w/ indicator

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

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