Sodium sulfate dissolves as follows: na2so4(s) → 2na (aq) so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m

0.05 moles of sodium sulfate are required.

Explanation:

Concentration of sodium ions in 1 L = 0.10 M

Moles of sodium ions = 0.10 mol

1 mole of sodium  sulfate gives 2 moles of sodium ions.

Then 0.10 mol of sodium ions will be given by:

0.05 moles of sodium sulfate are required.

it's filtration, but this is an assumption so my apologies if i got this