Flow chart procedure experiment

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