Question

Calculate the amount of H₂O required to make a solution of 4 mM, 158 mM, 0.1 g/L and 5 g/L of aqueous sodium sulfite solution. Show complete working out to determine the amount of H₂O required to make up the 4 solutions mentioned.

Answer 1

a. Concentration = 4mM = 4 × 10^-3 M

Moles of Sodium Sulfite / Volume of H₂O = 4 × 10^-3 M

Therefore, In 4 milimoles Sodium Sulfite, 1 L volume of water is needed.

b. Concentration = 158mM = 0.158M

Moles of Sodium Sulfite / Volume of H₂O = 0.158M

Therefore, In 158 milimoles Sodium Sulfite, 1 L volume of water is needed.

c. Concentration = 0.1 g/L

Therefore, In 0.1 gram Sodium Sulfite, 1 L volume of water is needed.

d. Concentration = 5 g/L

Therefore, In 5 gram Sodium Sulfite, 1 L volume of water is needed.