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Analytical Chem 2 > Neutralization > Flashcards

Neutralization Flashcards

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1
Q

Chemical Reaction in which an ACID/PROTON DONOR reacts with a BASE / PROTON ACCEPTOR

A

Neutralization

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2
Q

Neutralization Reaction Products

A

Salt, Water

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3
Q

Theories explaining color change of indicators

A

Physicochemical Theory
Organic Theory
Colloidal Theory

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4
Q

Attributes the color to certains ions

A

Physichochemical Theory

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5
Q

_____ in which causes the appearance of a new color
______ in which causes the disappearance of a color or the appearance of different color

A

Increase
Decrease

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6
Q

Attributes the color of indicators to certain groupings of the elements in a compound

A

Organic Theory

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7
Q

Assuemes that indicators form colloidal solutions

A

Colloidal Theory

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8
Q

How many drops of indicator should be used for a titration

A

3

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9
Q

Strong Acid + Strong Base

A

Methyl Red
Methyl Orange
Phenolphthalein

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10
Q

Weak Acid + Strong Base

A

Phenolphthalein

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11
Q

Weak alkali + Strong acid

A

Methyl Red

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12
Q

Weak Acid + Weak Base

A

Never titrate - no indicator will give a sharp endpoint

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13
Q

Methyl yellow

A

Acid: Red
Base: Yellow

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14
Q

Methyl orange

A

Acid: Pink
Base: Yellow

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15
Q

Methyl Red

A

Acid: Red
Base: Yellow

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16
Q

Bromophenol Blue

A

Acid: Yellow
Base: Blue

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17
Q

Bromocresol Purple

A

Acid: Yellow
Base: Purple

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18
Q

Bromothymol Blue

A

Acid: Yellow
Base: Blue

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19
Q

Phenolphthalein

A

Acid: Colorless
Base: Red

20
Q

Bromothymol Green

A

Acid: Yellow
Base: Blue

21
Q

Used to sharpen up the color change

A

Mixed indicators

22
Q

Acidimetry

A

Titration of base with a standard ACID
Analysis of Bases

23
Q

Aqueous Acidemetry

A
23
Q

VS in Acidimetry

A

Aqueous: HCl, H2SO4
Non-Aq: Perchloric Acid in glacial acetic acid, HBr

24
Q

Primary Std in Acidimetry

A

Aqueous: Anhydrous sodium carbonate
Non-Aq: Potassium biphthalate

25
Q

Secondart Std in Acidimetry

A

Aqueous: NaOH
Non-Aq: -

26
Q

Direct Titration in Acidimetry

A

Aqueous: NaOH, KOH, Na2CO3, NaHCO3
Non-Aq: Metacholine chloride

27
Q

Residual titration Acidimetry

A

Aqueous: ZnO, Na K tartrate, Milk of Magnesia, Methenamine
Non-Aq: -

28
Q

Indicators in Acidimetry

A

Aqueous: Methyl Red, methyl Orange, Phenolphthalein

Non-Aq:
Weak Bases: Crystal Violet, Malachite Green, Methylrosaniline chloride, Quinaldine Red, a-naphthol benzene

Strong Base: Methyl Red, Methyl Orange, Thymol Blue

29
Q

Non-aq Weakly basic substances

A

Amine
Amine salts
Heterocyclic hetero compouns
Alkali Sa;ts of organic acids
Alkali salts of weak inorganic acids
Amino acids

30
Q

Assay of Nitrogen Content

A

Kjeldahl Method

31
Q

Done if the ammonia is not quantitatively liberated from an organic nitrogen containing compound by acid or alkaline hydrolysis

A

Kjeldahl Method, Assay of Nitrogen Content

32
Q

Methods to reduce time of Digestion of Nitrogen

A

Addition of Potassium SO4 or anhydrous sodium sulfate
Addition of catalyst (Copper sulfate or Selenium)

33
Q

Kjeldahl Methods

A

Method I - Macromethod
Method II - Semimicromethod

34
Q

Ammonia is distilled into excess boric acid solution using 500 ml jheldahl flask

A

Method I - Macromethod

35
Q

Nitrates and Nitrites Absent

A

1g of substance

36
Q

Smaller samples employed using a semimicro kjeldahl appratus with 600 ml flask

A

2 - 3mg nitrogen

37
Q

Alkalimetry

A

Titration of acids with a standard base
Analysis of Base

38
Q

VS in Alkalimetry

A

Aqueous: NaOH, KOH (must be protected from CO2)
Non-Aq: Na methoxide, Li methoxide

39
Q

Primary Std in Alkalimetry

A

Aqueous: K biphthalate
Non-Aq: Benzoic Acid in dimethylformamide

40
Q

Secondary Std in Alkalimetry

A

Aqueous: HCl, H2SO4
Non-Aq: -

41
Q

Direct Titration Alkalimetry

A

Aqueous:
HCl
Dil. H3PO4
tartaric Acid
Boric Acid
Citric Acid

Non-Aq:
Phenytoin
Barbiturates

42
Q

Residual Titration in Alkalimetry

A

Aqueous:
Esters
Parabens
Acid anhydride
Acid chlorides
Aldehydes
Aspirin
Chloral hydrate
Formaldehyde

43
Q

Indicator in Alkalimetry

A

Aqueous:
Methy Red
Phenolphthalein
Methyl orange

Non-Aq:
Weak Acid: O-nitroaniline
Weak to Intermediate: Azo-violet
Intermediate: Thymol Blue
Strong: EDTA

44
Q

Non-aqueous Titration: Weakly acidic drug

A

Acid halides
Anhydride
Amino acids
Enold

Analytical Chem 2 (17 decks)

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