Laboratory Methods of Organic Chemistry - Sciencemadness Dot Org

EQUIPMENT EEQUIEED BY THE BEGINNEE 91
Pipettes, 5, 10, 20 c.c, and at least 6 small ones. Also one of
2 c.c. capacity graduated in tenths of a c.c.
Porcelain basins, 15, 20, 25 cm. in diameter.
Porcelain spatulae, 3.
Porous pot. Pieces of porous plate about 3 mm. across.
Round-bottomed flasks, 50, 100, 250, 500 c.c, two of each.
Scales (apothecaries, capacity 50-100 g. Protect knives from
rust by smearing with vaseline). Set of weights for the balance,
0-02-50-0 g.
Scissors.
Separating funnels, 500, 1000 c.c.
Slides (microscope), 3.
String.
Test papers. Litmus, blue and red, turmeric, Congo. Potassium
iodide-starch paper.
Test tube holder.
Test tubes, at least 50 of ordinary size, 20 of small size. Half of
the test tubes must always be kept clean and dry.
Thermometers. One standardised for melting point determination
and two others, including a short one, for ordinary use.
Tongs.
Towel.
Vacuum desiccators, two large ones (16 and 18 cm. diameter).
Wash-bottles, 2.
Watch-glasses, chiefly small.
II. SOLVENTS
Acetic acid, glacial, 500 c.c.
Acetone, 100 c.c.
Alcohol, 96 per cent, one litre.
Alcohol, absolute, 500 c.c.
Benzene (over sodium wire), 500 c.c.
Chloroform, 100 c.c.
Ether, absolute, over sodium, 1 500 c.c.
1 In order to prepare absolute ether the commercial product (1-2 1.) is first
dried for one to two weeks over calcium chloride (weight about 10 per cent of the
weight of the ether taken) and poured rapidly through a folded filter into a dry
flask into which sodium wire is driven from a press. Until the evolution of hydrogen
ceases, a calcium chloride tube, drawn out to a fine capillary so as to reduce the