Question

Calculate the molarity of sodium sulphate in the solution prepared by dissolving its 8gm in enough water to form 345 ml of the solution

Answer 1

Explanation:

first find the mole of sodium sulphate. formula of sodium sulphate is na2so4.

mole=given mass÷molarmass

= 8 ÷ 142

=.05

now

molarity = mole of solute÷ volume of solution ×1000

= .05÷345×1000

answer is .07 molarity