Express the concentration of this solution as ppm Na+ ion, at 25 oC: 4.2 x 10−5...

Express the concentration of this solution as ppm Na+ ion, at 25 oC: 4.2 x 10−5 M Na2SO4.

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Expert Solution

Molarity of Na2SO4 = 4.2 x 10^-5 M

= 4.2 x 10^-5 mol / L

molarity of Na+ = 2 x 4.2 x 10^-5

= 8.4 x 10^-5 mol / L

molar mass of Na2SO4 = 142.04 g/mol

concentration of Na+ = 8.4 x 10^-5 mol / L x 142.04 g/mol

= 0.01193 g / L

= 11.9 mg / L

concentration of Na+ = 11.9 ppm

queen_honey_blossom answered 2 years ago

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