GROUP VIB - CHROMIUM GROUP

Cr, Mo, W, U

elements in group VIB

Chromium

• color

• used in hardening of steel

• coating to protect against corrosion

chromium trioxide

• chromic anhydride

• chromic acid

• as diluted solution - astringent

Chromic oxide

green

Chromic hydroxide

blue

Chromic nitrate

purplish red

Chromic phosphate

bluish-green

Potassium chromate

indicator for titrimetric analysis of Ag compounds

potassium dichromate

• treatment of GASTRIC ULCERS

• used in TANNING & BLEACHING

Molybdenum

• never used in medicine

• compounds are used for determination of phosphates

Tungsten

• Wolfram

• used as filaments in electric light bulbs

Phosphotungstic acid

used as qualitative test reagent for alkaloids

Uranium

• radioactive

uranyl nitrate

• treatment of spreading sluggish ulcers

• for titrimetric analysis of phosphoric acid