Apparatus :-

a) 2 numbers of porcelain evaporating dish, about 12 cm in diameter within aflat bottom.

b) 3 numbers of shrinkage dish made of non-corroding metal, having a flat bottom, 45 mm diameter and 15 mm high.

c) A glass cup of about 50 mm diameter and 25 mm high.

d) Two numbers glass plates of size 75*75*3 mm, one plate of plane glass and the other with three metalprongs.

e) Spatula balance accurate to 0.01 g, oven etc.

f) Mercury.

g) Desiccator and otheraccessories.