titration pp

NEUTRALIZATION REACTIONS

Chemical processes in which an acid reacts with a base.

• Acidimetry

• Alkalimtery

• If titrant is acid =

• If titrant is base =

True

True or false

• At the equivalence point, moles of analyte = moles of titrant

Acid bsa indicators

are usually weak organic acids or bases in which the undissociated molecule has one color, and the anion and cation produced by dissociation has another color.

• Methyl red, methyl orange, phenolphthalein

• Phenolphthalein

• Methyl red

Identify the indicator

• Na2CO, tromethamine

• Methyl red, bromocresol green

• Blue to pale yellow

HCl standardization

• 1o

  • Old:

  • New:

• indicator

  • Old:

  • New:

• Endpoint:

• NaOH, tromethamine

• Phenolphthalein

• Pink to colorless

H2SO4 standardization

• 1o

  • Old:

  • New:

• indicator:

• Endpoint:

• HCl

• H2SO4

Standard acidimteric solutions

• Potassium biphthalate

• Phenolphthalein

• Colorless to pink

NaOH/KOH standardization

• 1o

• indicator:

• Endpoint:

Kjeldahl method

For nitrogen determination (in organic substances plus the nitrogen contained in the inorganic compounds ammonia and ammonium)

• NaHCO3

• NaOH

• Sodium salicylate tablets

What are the assays that use direct acidimetry

• ZnO

• MgOH

• Methenamine

• KNaT

What are the assays that use residual acidimetry

• HCl

• Dil. Phosphoric acid

• H3BO4

• 2-phenoxyethanol

• Tartaric acid

What are the assays that use direct alkalimtery

Aspirin capsules

What are the assays that use residual alkalimetry

Methacoline chloride

What are the assays that use direct acidimetry (non aqueous)

Phenytoin

What are the assays that use direct alkalimetry (non aqueous)

• Chelometric CaCO3

• Hydroxynaphthol blue

• Red to blue

Na2EDTA Standardization

• 1o

• Indicator

• Endpoint

• Direct

• EDTA

• None

• 12-13

• NaOH

• Hydroxynaphthol blue

• Red to blue

Identify the ff: Ca2+ complexation

• Type of titration

• Titrant

• Backtitratnt

• pH

• Buffer

• Indicator

• Endpoint

• Direct

• EDTA

• None

• 10

• NH3-NH4Cl buffe

• Eriochrome black

• Wine red or purple → black

Identify the ff: Mg2+ Mn2+ Zn2+ complexation

• Type of titration

• Titrant

• Backtitratnt

• pH

• Buffer

• Indicator

• Endpoint

• Residual

• EDTA

• ZnSO4

• 4

• HOAc-NH3OAc buffe

• Dithiozone

• Purplish green to pink

Identify the ff: Al3+ complexation

• Type of titration

• Titrant

• Backtitratnt

• pH

• Buffer

• Indicator

• Endpoint

• Na2EDTA

• Dithiozone

• Purplish green → pink

ZnSO4 × 7H2O standardization

• 1o

• Indicator

• Endpoint

• Arsenic trioxide, sodium oxalate

• Self indicating

• Purple to pale pink

KMnO4 standardization

• 1o

  • Old:

  • New:

• Indicator

• Endpoint

H2O2 Solution

What are the assays that use direct permanganometry

Cheery uice for malic acid

What are the assays that use indirect permanganometry

Sodium nitrite

What are the assays that use residual permanganometry

• KMnO4

• Self indicating

• Purple to pale pink

H2C2O4 (Oxalic acid) standardization

• 1o

• Indicator

• Endpoint

Ferrous sulfate tablets

What are the assays that use direct cerimetry

• Sodium oxalate

• None

• Orange to yellow

Ce(SO4)2 standardization

• 1o

• Indicator

• Endpoint

• Na2S2O3

• Starch TS

• Colorless to blue

I2 standardization

• 1o

• Indicator

• Endpoint

• Potassium dichromate

• Starch TS

• Blue to colorless

Na2S2O3 standardization

• 1o

• Indicator

• Endpoint

• Antimony potassium tartrate

• Ascorbic acid

What are the assays that use iodimetry

Methionine

What are the assays that use iodometry (residual)

• SeS2

• Sodium hypochlorite solution

• Cupric sulfate

• Thyroid

What are the assays that use iodometry

• NaCl

• Eosin Y TS

• Pink ppt

AgNO3 standardization

• 1o

• Indicator

• Endpoint

• AgNO3

• Ferric NH4SO4

• Red-brown ppt

NH4CN standardization

• 1o

• Indicator

• Endpoint

• AgNO3

• X-

• None

• Flocculation

Gay lussac; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• AgNO3

• X-

• K2CrO4

• Red ppt

Mohr; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• AgNO3 (Excess), NH4SCN (Back)

• X-

• Ferric alum

• Red brown complex

Volhard residual; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• NH4SCN

• Hg+

• Ferric alum

• Red brown complex

Volhard direct; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• AgNO3

• CN-

• None

• White turbid

Liebig; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• AgNO3

• CN-

• NH3

• Yellow ppt

Denige’s; identify the:

• Titrant

• Analyte

• Indication

• Endpoint

• AgNO3

• X-

• DCF (Dichlorofluorescin)

• Green to pink ppt

Fajan’s ; identify the:

• Titrant

• Analyte

• Indication

• Endpoint