What is the concentration of NA + in parts per million by mass in 0.00152M Na2SO4

Answer 1

To find the concentration of Na+ in parts per million by mass, we need to first calculate the molar mass of Na+.

The molar mass of Na+ is 22.99 g/mol.

Next, we need to find the mass of Na+ in 1 liter of 0.00152M Na2SO4 solution.

There are 2 Na+ ions per 1 Na2SO4 molecule, so the molarity of Na+ ions is 2 x 0.00152M = 0.00304M.

The mass of Na+ ions in 1 liter of solution is:

0.00304 mol/L x 22.99 g/mol = 0.069856 g/L

To convert this to parts per million (ppm), we need to multiply by 1,000.

0.069856 g/L x 1,000 = 69.856 ppm

Therefore, the concentration of Na+ in parts per million by mass in 0.00152M Na2SO4 is 69.856 ppm.