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PHARM ANA LAB > M4 > Flashcards

M4 Flashcards

1
Q

Based on the FORMATION OF RELATIVELY INSOLUBLE SUBSTANCES to cause the reaction to go to completion quantitatively.

A

PRECIPITIMETRY

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2
Q

Most widely used PRECIPITATING AGENT/ standard solution

A

SILVER NITRATE

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3
Q

if the titrant used is AgNO3 standard solution

A

ARGENTOMETRY

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4
Q

Adsorption Indicators

A
  1. Dichlorofluorescein (DCF)
  2. Eosin Y
  3. Tetrabromophenolphthalein ethyl ester (TEE)
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5
Q
  • Used in ANALYSIS OF HALIDES by DIRECT TITRATION w/ AgNO3 as standard solution
  • Are WEAK ACIDS
  • Endpoint best seen in DIFFUSED-LIGHT condition
A

ADSORPTION INDICATORS

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6
Q

adsopriton indicators are best seen in

A

DIFFUSED-LGIHT CONDITION

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7
Q

– DIRECT AND RESDIUAL titration
– Use NH4SCN as standard solution

A

FERRIC AMMONIUM SULFATE (FERRIC ALUM)

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8
Q

ENDPOINT:
FERRIC AMMONIUM SULFATE (FERRIC ALUM) (indicator) + NH4SCN (standard soln)

A

REDDISH BROWN COMPLEX

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9
Q

ENDPOINT:
Standardization of 0.1 N AgNO
Primary standard: NaCl
Indicator: Eosin Y

A

PINKISH TO MAGENTA

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10
Q

Standardization of 0.1 N AgNO3
* Type and Method: _______
* Stock solution: 0.1 N AgNO3
* Titrant: 0.1 N AgNO3
* Primary Standard:Sodium chloride (NaCl)
* Indicator: Eosin Y
* Endpoint: Magenta

A

DIRECT PRECIPITIMETRY

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11
Q

Standardization of 0.1 N AgNO3
* Type and Method: Direct Precipitimetry
* Stock solution: _________
* Titrant: 0.1 N AgNO3
* Primary Standard:Sodium chloride (NaCl)
* Indicator: Eosin Y
* Endpoint: Magenta (

A

0.1N AgNO3

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12
Q

Standardization of 0.1 N AgNO3
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N AgNO3
* Titrant: _________
* Primary Standard:Sodium chloride (NaCl)
* Indicator: Eosin Y
* Endpoint: Magenta (

A

0.1N AgNO3

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13
Q

Standardization of 0.1 N AgNO3
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N AgNO3
* Titrant: 0.1 N AgNO3
* Primary Standard: ________
* Indicator: Eosin Y
* Endpoint: Magenta (

A

SODIUM CHLORIDE (NaCl)

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14
Q

Standardization of 0.1 N AgNO3
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N AgNO3
* Titrant: 0.1 N AgNO3
* Primary Standard:Sodium chloride (NaCl)
* Indicator: ______
* Endpoint: Magenta (

A

EOSIN Y

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15
Q

Standardization of 0.1 N AgNO3
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N AgNO3
* Titrant: 0.1 N AgNO3
* Primary Standard:Sodium chloride (NaCl)
* Indicator: Eosin Y
* Endpoint: _____

A

MAGENTA

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16
Q

Standardization of 0.1 N NH4SCN
* Type and Method: _________
* Stock solution: 0.1 N NH4SCN
* Titrant: 0.1 N NH4SCN
* Secondary Std: 0.1 N AgNO3 (M4 L1)
* Indicator: Ferric alum
* Endpoint: Reddish-brown

A

DIRECT PRECPITIMETRY

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17
Q

Standardization of 0.1 N NH4SCN
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N NH4SCN
* Titrant: ________
* Secondary Std: 0.1 N AgNO3 (M4 L1)
* Indicator: Ferric alum
* Endpoint: Reddish-brown

A

0.1N NH4SCN

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18
Q

Standardization of 0.1 N NH4SCN
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N NH4SCN
* Titrant: 0.1 N NH4SCN
* Secondary Std: _________
* Indicator: Ferric alum
* Endpoint: Reddish-brown

A

0.1N AgNO3

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19
Q

Standardization of 0.1 N NH4SCN
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N NH4SCN
* Titrant: 0.1 N NH4SCN
* Secondary Std: 0.1 N AgNO3 (M4 L1)
* Indicator: ________
* Endpoint: Reddish-brown

A

FERRIC ALUM

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20
Q

Standardization of 0.1 N NH4SCN
* Type and Method: Direct Precipitimetry
* Stock solution: 0.1 N NH4SCN
* Titrant: 0.1 N NH4SCN
* Secondary Std: 0.1 N AgNO3 (M4 L1)
* Indicator: Ferric alum
* Endpoint: __________

A

REDDISH-BROWN

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21
Q

A form of residual or back-titration

A

VOLHARD METHOD

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22
Q

COMPLETE PRECIPITATION OF INSOLUBLE SILVER SALTS with the addition of excess silver nitrate to precipitate

A

VOLHARD METHOD

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23
Q

Volhard method is Followed by titration of the unreacted silver nitrate with ________

A

AMMONIUM THIOCYANATE

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24
Q

Dried, sieved, edible and iodized for human consumption

A

IODIZED SALT

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25
Q

NaCl content of IODIZED SALT

A

NLT 97%

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26
Q

BODY REQUIREMENT:
Potassium iodate

A

50-84 mg/kg

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27
Q

BODY REQ:
Iodine

A

30-50 mg/kg

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28
Q

Assay of NaCl Content in Iodized salt
* Type and Method: ______
* Titrant: 0.1 N NH4SCN
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: Sodium chloride (NaCl)
* Indicator: Ferric alum
* Endpoint: Reddish-brown
* Specification: NLT 97 %

A

RESIDUAL PRECIPITIMETRY (VOLHARD METHOD)

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29
Q

Assay of NaCl Content in Iodized salt
* Type and Method: Residual Precipitimetry
(Volhard method)
* Titrant: ________
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: Sodium chloride (NaCl)
* Indicator: Ferric alum
* Endpoint: Reddish-brown
* Specification: NLT 97 %

A

0.1N NH4SCN

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30
Q

Assay of NaCl Content in Iodized salt
* Type and Method: Residual Precipitimetry
(Volhard method)
* Titrant: 0.1 N NH4SCN
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: _________
* Indicator: Ferric alum
* Endpoint: Reddish-brown
* Specification: NLT 97 %

A

SODIUM CHLORIDE (NaCl)

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31
Q

Assay of NaCl Content in Iodized salt
* Type and Method: Residual Precipitimetry
(Volhard method)
* Titrant: 0.1 N NH4SCN
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: Sodium chloride (NaCl)
* Indicator: ________
* Endpoint: Reddish-brown
* Specification: NLT 97 %

A

FERRIC ALUM

32
Q

Assay of NaCl Content in Iodized salt
* Type and Method: Residual Precipitimetry
(Volhard method)
* Titrant: 0.1 N NH4SCN
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: Sodium chloride (NaCl)
* Indicator: Ferric alum
* Endpoint: ________
* Specification: NLT 97 %

A

REDDISH-BROWN

33
Q

Assay of NaCl Content in Iodized salt
* Type and Method: Residual Precipitimetry
(Volhard method)
* Titrant: 0.1 N NH4SCN
* Standard Solns: 0.1 N NH4SCN (M4 L2)
0.1 N AgNO3 (M4 L1)
* Analyte: Sodium chloride (NaCl)
* Indicator: Ferric alum
* Endpoint: Reddish-brown
* Specification: _______

A

NLT 97%

34
Q

A molecule which PROVIDES GROUP FOR ATTACHMENT to metal ions

A

LIGAND

35
Q

A complex that contains TWO OR MORE GROUPS that can donate electrons

A

CHELATE

36
Q

a.k.a. Coordination compounds

A

COMPLEX

37
Q

Complexation Reaction:

A

METAL + LIGAND = COMPLEX

38
Q

METAL ION reacts with a suitable ligand to form a complex, and the end point is determined by an indicator or an appropriate instrumental method

A

COMPLEXIMETRY

39
Q

Metal as titranD + Ligand as titranT

A

COMPLEXIMETRY

40
Q

______ reacts with a suitable ligand to form a complex

A

METAL ION

41
Q

Metal ion reacts with a suitable _____ to form a complex

A

LIGAND

42
Q

Metal ion reacts with a suitable ligand to form a ________

A

COMPLEX

43
Q

A hexadentate ligand

A

EDTA

44
Q

Commonly used in the concentration of 0.05 M

A

EDTA

45
Q

MW of EDTA

A

372

46
Q

Standardization of 0.05 M EDTA
* Type and Methods: ___________
* Titrant: 0.05 M EDTA
* Stock Solution: 0.05 M EDTA
* Primary Standard: Calcium carbonate
(CaCO3)
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color

A

DIRECT COMPLEXIMETRY

47
Q

Standardization of 0.05 M EDTA
* Type and Methods: Direct Compleximetry
* Titrant: _____
* Stock Solution: 0.05 M EDTA
* Primary Standard: Calcium carbonate
(CaCO3)
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color

A

0.05M EDTA

48
Q

Standardization of 0.05 M EDTA
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Stock Solution: 0.05 M EDTA
* Primary Standard: _________
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color

A

CALCIUM CARBONATE (CaCO3)

49
Q

Standardization of 0.05 M EDTA
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Stock Solution: 0.05 M EDTA
* Primary Standard: Calcium carbonate
(CaCO3)
* Indicator: __________
* Endpoint: Blue color

A

HYDROXYLNAPHTHOL BLUE

50
Q

Standardization of 0.05 M EDTA
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Stock Solution: 0.05 M EDTA
* Primary Standard: Calcium carbonate
(CaCO3)
* Indicator: Hydroxynaphthol Blue
* Endpoint: _____

A

BLUE

51
Q

To solubilize and stabilize CaCO3

A

addition of HCl

52
Q

– Alkalizes the solution to pH 12.3-12.5
– Stabilizes the Ca-EDTA complex
– Masks Mg ions

A

addition of NaOH

53
Q

An odorless, white powder

A

CALCIUM SULFATE (CaSO4)

54
Q

Calcium sulfate (CaSO4)
Exist as:

A
  1. Anhydrous
  2. Dihydrate (Gypsum)
  3. Hemihydrate (Plaster of Paris)
55
Q

GYPSUM

A

DIHYDRATE

56
Q

PLASTER OF PARIS

A

HEMIHYDRATE

57
Q

Uses:
* Dessicant
* Building or molding material

A

CALCIUM SULFATE

58
Q

Assay of Calcium sulfate
* Type and Methods: ___________
* Titrant: 0.05 M EDTA
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: Calcium sulfate
(CaSO4)
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color
* USP limit: 98 - 101%

A

DIRECT COMPLEXIMETRY

59
Q

Assay of Calcium sulfate
* Type and Methods: Direct Compleximetry
* Titrant: _________
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: Calcium sulfate
(CaSO4)
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color
* USP limit: 98 - 101%

A

0.05M EDTA

60
Q

Assay of Calcium sulfate
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: __________
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color
* USP limit: 98 - 101%

A

CALCIUM SULFATE (CaSO4)

61
Q

Assay of Calcium sulfate
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: Calcium sulfate
(CaSO4)
* Indicator: _________
* Endpoint: Blue color
* USP limit: 98 - 101%

A

HYDROXYNAPHTHOL BLUE

62
Q

Assay of Calcium sulfate
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: Calcium sulfate
(CaSO4)
* Indicator: Hydroxynaphthol Blue
* Endpoint: ________
* USP limit: 98 - 101%

A

BLUE

63
Q

Assay of Calcium sulfate
* Type and Methods: Direct Compleximetry
* Titrant: 0.05 M EDTA
* Standard Solution: 0.05 M EDTA (M4 L4)
* Analyte: Calcium sulfate
(CaSO4)
* Indicator: Hydroxynaphthol Blue
* Endpoint: Blue color
* USP limit: _________

A

98 - 101%

64
Q

The capacity of cations in water to form SPARINGLY SOLUBLE PRODUCTS that cause “SCUM” in the sink or bathtub

A

WATER HARDNESS

65
Q

water hardness is Expressed in terms of

A

CaCO3 or Ca content

66
Q

Due to presence of BICARBONATES

A

TEMPORARY WATER HARDNESS

67
Q

Due to presence of CHLORIDES AND SULFATES

A

PERMANENT WATER HARDNESS

68
Q

Normality formula

A

N = g / meqwt x mL

69
Q

meqwt formula

A

meqwt = MW / feq x 1000

70
Q

Normality with secondary standard formula

A

N1V1 = N2V2

71
Q

Residual Precipitimetry formula

A

%A = (NxsVxs - NtitrantVtitrant) x meqwt / gsx x 100

72
Q

EDTA meaning

A

Ethylenediaminetetraacetic acid

73
Q

EDTA is usually mixed with

A

water

74
Q

Molarity formula

A

M = g / MW/1000 x mL

75
Q

remove undesired metals

A

masking agent

76
Q

a drying agent

A

hygroscopic substance

77
Q

Direct Compleximetry formula (%A with M)

A

%A = M x mL x MW/1000 / g x 100

PHARM ANA LAB (7 decks)

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