MOD 6: QC/QA - 6

Aluminum ion (Al 3+)

What metal ion is assayed through residual titration with EDTA?

Ca 2+

Complexometry of ____ uses Hydroxynaphthol Blue as indicator

Mg 2+ and Zn 2+

Complexometry of _____ uses Eriochrome Black as indicator

Al 3+

Complexometry of _____ uses Dithizone as indicator

pH = 13; Buffer = Sodium Hydroxide

Complexing Ca 2+ requires a pH of ____ and uses ____ as buffer

pH = 10-11; Buffer = Ammonia - Ammonium Chloride

Complexing Mg 2+ or Zn 2+ requires a pH of ____ and uses ______ as buffer

pH = 3-4; Buffer = Glacial Acetic Acid

Complexing Al 3+ requires a pH of ____ and uses ____ as buffer

Potassium Cyanide (KCN)

Masking agent for Ni and Cu

Ammounium fluoride (NH4F)

Masking agent for Be, Mg, Ca, and Al

Thioglycol

Masking agent for Cu and Hg ions for assay of ZINC

Triethanolamine

Masking agent for Al during assay of MAGNESIUM

Yellow

Color of CdS

Pink

Color of MnS

H2SO4

KMnO4 is an oxidizing agent only in acidic medium, therefore ____ is added in permanganometric titrations

Cerimetry

What type of redox titration is conducted for the assay of Hydroquinone, Menadione, and FeSO4 tablets

Orthophenanthroline

This indicator is used in Cerimetry and causes a color change from red to blue color as its endpoint

Sodium thiosulfate

Primary standard of Koppescharr's solution

0.5 mg/g

According to USP, drying to constant weight means a difference of ____ mg/g between 2 consecutive weighings

500-550 deg C

Very dull red heat temperature

550-700 deg C

Dull red heat temperature

800-1000 deg C

Bright red heat temperature

1000-1200 deg C

Yellow red heat temperature

1200-1600 deg C

White heat temperature