13-14 Table 1

Chemical Education Journal (CEJ), Vol. 13, No. 14 /Registration No. 13-14 /Received july 19, 2009.
URL = http://chem.sci.utsunomiya-u.ac.jp/cejrnlE.html

Table 1 Comparative materials and expenditure incurred with BIT and NBIT for sodium extract preparation per student and per batch of 40 students.

Expenditure

BIT NBIT

Items per student per batch per student per batch

Sodium metal 0.04 x 8 = 0.32 g 12.8 g 0.05 g 1.6 g

Organic compound 0.05 x 8 = 0.40 g 16.0 g 0.05 g 1.6 g

Glass material 2 x 8 = 16 g 16 x 40 = 640 g 0 g 0 g

Filter paper 100 cm² 0 g 0 g

Funnel 1 40 0 0

Biogas for heating 0.1 kg m^-3 0.1 x 8 x 40 = 32 kg m^-3 0.1 kg m^-3 0.1 x 40 = 8.0 kg m^-3

Water 2 L 80 L 500 mL0 20 mL

Electricity 64 units 64 units 20 units 20 units

Expenditure
	BIT		NBIT
Items	per student	per batch	per student	per batch
Sodium metal	0.04 x 8 = 0.32 g	12.8 g	0.05 g	1.6 g
Organic compound	0.05 x 8 = 0.40 g	16.0 g	0.05 g	1.6 g
Glass material	2 x 8 = 16 g	16 x 40 = 640 g	0 g	0 g
Filter paper	100 cm²		0 g	0 g
Funnel	1	40	0	0
Biogas for heating	0.1 kg m^-3	0.1 x 8 x 40 = 32 kg m^-3	0.1 kg m^-3	0.1 x 40 = 8.0 kg m^-3
Water	2 L	80 L	500 mL0	20 mL
Electricity	64 units	64 units	20 units	20 units