Exercises:
Open the following POWERPOINT presentation to see the exercises
IGCSE SOLUTIONS EXERCISES WITH EXAMPLES 2020-2021
1. How many grams of solute we need to prepare 1L of the following solutions?
- 1.5 M LiCl ANS: 63.75
- 0.3M K2SO4 ANS: 52.2
- 2M NaCl ANS: 117
- 0.5 M KI ANS: 83
- 0.05 M (NH4)2S2O8 ANS: 11.4
2.How many grams of solute we need to prepare 250 cm3 of the following solutions?
- 1.5 M LiCl ANS: 15.93
- 0.3M K2SO4 ANS: 65.25
- 2M NaCl ANS: 29.25
- 0.5 M KI ANS: 20.75
- 0.05 (NH4)2S2O8 ANS: 11.4
3) Find the molarity of the following solutions:
- 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
- 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.
- 0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.
- 734 grams of lithium sulfate are dissolved to make 2500 mL of solution.
- 6.7 x 10-2 grams of PbCl2 are dissolved to make 30.5 mL of solution