Question

What mass of na2so4 is needed to prepare 350. ml of a solution having a sodium ion concentration of 0.125 m?

Answer 1

Answer and Explanation:

6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution.

You have to know that molarity is a measure of the concentration of a solute that is defined as the number of moles of solute that are dissolved in a certain volume.

number of moles of solute= 0.125 M×0.350 L=0.04375

142 g/mole is the molar mass of Na₂SO that's the mass of one mole of the compound and the amount of mass that contains 0.04375 moles. Mass= 0.04375 moles× 142 g/mole therefor mass= 6.2125 g.

So, 6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion of  0.125 M

Please let me know if I did anything wrong. I'm pretty sure I'm right but I cant always be sure.

Answer 2

Answer:

6.2125 g

Explanation:

6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion concentration of  0.125 M.