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Chromium hydroxide precipitate
Description:
Chromium hydroxide precipitate formed by adding sodium hydroxide (NaOH) to a solution containing chromium ions. The simplest chromium ion in solution is the hexaaquochromium ion (Cr(H2O)6). When NaOH is added chromium hydroxide (Cr(H2O)3(OH)3) is precipitated out of solution as a pale grey/green solid. Excess NaOH causes a further change to the chromite ion (CrOH6) in a dark green solution. Addition of sodium hydroxide is used as a test for positive metal ions in solution.
Credit:
Andrew Lambert Photography/Science Source
Unique identifier:
SS293216
Legacy Identifier:
SB5032
Type:
Image
Size:
3623px × 4920px (~50 MB)
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Tags
A500/0416
A500/416
A5000416
alkaline
analysis
analytical
apparatus
chemistry
chromite
chromium hydroxide
complex
density experiment
glassware
hexaaquochromium
insoluble
ions
lab
precipitate
precipitating
precipitation
reacting
reaction
salt
sodium
solid
solution
test
test tube
testing
vertical
