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PHARM ANA LAB > M4 > Flashcards

M4 Flashcards

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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
NaCl content of IODIZED SALT
NLT 97%
26
BODY REQUIREMENT: Potassium iodate
50-84 mg/kg
27
BODY REQ: Iodine
30-50 mg/kg
28
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 %
RESIDUAL PRECIPITIMETRY (VOLHARD METHOD)
29
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 %
0.1N NH4SCN
30
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 %
SODIUM CHLORIDE (NaCl)
31
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 %
FERRIC ALUM
32
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 %
REDDISH-BROWN
33
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: _______
NLT 97%
34
A molecule which PROVIDES GROUP FOR ATTACHMENT to metal ions
LIGAND
35
A complex that contains TWO OR MORE GROUPS that can donate electrons
CHELATE
36
a.k.a. Coordination compounds
COMPLEX
37
Complexation Reaction:
METAL + LIGAND = COMPLEX
38
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
COMPLEXIMETRY
39
Metal as titranD + Ligand as titranT
COMPLEXIMETRY
40
______ reacts with a suitable ligand to form a complex
METAL ION
41
Metal ion reacts with a suitable _____ to form a complex
LIGAND
42
Metal ion reacts with a suitable ligand to form a ________
COMPLEX
43
A hexadentate ligand
EDTA
44
Commonly used in the concentration of 0.05 M
EDTA
45
MW of EDTA
372
46
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
DIRECT COMPLEXIMETRY
47
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
0.05M EDTA
48
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
CALCIUM CARBONATE (CaCO3)
49
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
HYDROXYLNAPHTHOL BLUE
50
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: _____
BLUE
51
To solubilize and stabilize CaCO3
addition of HCl
52
– Alkalizes the solution to pH 12.3-12.5 – Stabilizes the Ca-EDTA complex – Masks Mg ions
addition of NaOH
53
An odorless, white powder
CALCIUM SULFATE (CaSO4)
54
Calcium sulfate (CaSO4) Exist as:
1. Anhydrous 2. Dihydrate (Gypsum) 3. Hemihydrate (Plaster of Paris)
55
GYPSUM
DIHYDRATE
56
PLASTER OF PARIS
HEMIHYDRATE
57
Uses: * Dessicant * Building or molding material
CALCIUM SULFATE
58
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%
DIRECT COMPLEXIMETRY
59
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%
0.05M EDTA
60
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%
CALCIUM SULFATE (CaSO4)
61
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%
HYDROXYNAPHTHOL BLUE
62
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%
BLUE
63
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: _________
98 - 101%
64
The capacity of cations in water to form SPARINGLY SOLUBLE PRODUCTS that cause “SCUM” in the sink or bathtub
WATER HARDNESS
65
water hardness is Expressed in terms of
CaCO3 or Ca content
66
Due to presence of BICARBONATES
TEMPORARY WATER HARDNESS
67
Due to presence of CHLORIDES AND SULFATES
PERMANENT WATER HARDNESS
68
Normality formula
N = g / meqwt x mL
69
meqwt formula
meqwt = MW / feq x 1000
70
Normality with secondary standard formula
N1V1 = N2V2
71
Residual Precipitimetry formula
%A = (NxsVxs - NtitrantVtitrant) x meqwt / gsx x 100
72
EDTA meaning
Ethylenediaminetetraacetic acid
73
EDTA is usually mixed with
water
74
Molarity formula
M = g / MW/1000 x mL
75
remove undesired metals
masking agent
76
a drying agent
hygroscopic substance
77
Direct Compleximetry formula (%A with M)
%A = M x mL x MW/1000 / g x 100

PHARM ANA LAB (7 decks)

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