Potassium trichromate (III) trioxalate trihydrate is prepared by dissolving oxalic acid dihydrate in water and adding potassium dichromate. Potassium oxalate monohydrate is then added to the mixture, which is heated until it reaches boiling. The mixture is then filtered and the green-black solid formed is washed with ethanol and water solutions and dried to obtain the potassium trichromate (III) trioxalate trihydrate compound.

1. Flow Chart Preparation of K3[Cr(C2O4)3].3H2O
2.75 g
Oxalic acid
dihydrate
Magetic
strirer
10 ml cold
water
0.9 g
potassium
dichromate
Heat
1.1 g
ppotssium
oxalate
monohydrate
2ml
ethanol
Water bath
mixture
5ml ethanol
mixture Ice bath
Mixture
bunchner
funnel
Allow for 30
minutes
dry and
weight
green black
solid formed
three 5 ml portions of
cold 2:1 ethanol/water
and then with 10 ml
ethanol
Until almost to boiling
point and a vigorous
evolution of gas
occurs.
Sauyrah Ashikin UPSI ‘13