Question

A solution contains 30 g of glucose in 200mL of water ,another solution contains 20 g of salt in 150mL of water . Calculate the mass percent of ............ (a) glucose (b) salt .13 % , 0.11 % 0.20% % , 10.1 % 13.0% , 11.7 % 1.33 % , 1.11 %

Answer 1

Answer:

The solution contain 30g glucose , 20 g salt and 500g water(density of water = 1g/ml so 500ml= 500g)

Total weight of solution by mass = 30g + 20g + 500 g = 550g

Mass % of glucose = 30/ 550 *100 = 5.45 %

Mass % of salt = 20 /550 *100 = 3.63% 

4.3