How do u work this out??

Question

9.00L of a solution that is 60.0ppm in Na+, starting with solid NaSO4

Answer 1

Ppm = mg/L, so 60 ppm = 60 mg/L

9 L = 60×9 = 540 mg Na. Work out the number of moles 540 mg Na is, then divide by 2, because sodium sulfate is Na2SO4. Then convert that number to mass of Na2SO4.