Analía Bellizzi – Chemistry Classes

Ronald Reagan Senior High School

Solutions Exercises

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. 1.5 M LiCl                  ANS: 63.75
  2. 0.3M K2SO4               ANS: 52.2
  3. 2M NaCl                   ANS: 117
  4. 0.5 M KI                  ANS: 83
  5. 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. 1.5 M LiCl                     ANS: 15.93
  2. 0.3M K2SO4                      ANS: 65.25
  3. 2M NaCl                       ANS:  29.25
  4. 0.5 M KI                       ANS: 20.75
  5. 0.05 (NH4)2S2O8              ANS: 11.4

3)  Find the molarity of the following solutions:

  1.   0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
  2.   0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.
  3.   0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.
  4.   734 grams of lithium sulfate are dissolved to make 2500 mL of solution.
  5.   6.7 x 10-2 grams of PbCl2 are dissolved to make 30.5 mL of solution