Question

2) How to make 0.05%, 0.10%, 0.20, 0.30% and 0.40% (g/10ml), W/V ethanol standards

Answer 1

a) 0.05 %

100 ml of solution contain 0.05 g of ethanol

10 ml will contain = 0.05 x 10 / 100 = 0.005 g

b) 0.10 %

100 ml of solution contain 0.10 g of ethanol

10 ml will contain = 0.10 x 10 / 100 = 0.01 g

c) 0.20 %

100 ml of solution contain 0.20g of ethanol

10 ml will contain = 0.20 x 10 / 100 = 0.020g

d) 0.30 %

100 ml of solution contain 0.30 g of ethanol

10 ml will contain = 0.30x 10 / 100 = 0.030 g

e) 0.40 %

100 ml of solution contain 0.40 g of ethanol

10 ml will contain = 0.40 x 10 / 100 = 0.040 g