posted by Anonymous
Determine the concentrations of Na2CO3, Na , and CO32– in a solution prepared by dissolving 2.57 × 10–4 g Na2CO3 in 1.50 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm). Note: Determine the formal concentration of CO32–. Ignore any reactions with water
mols Na2CO3 = grams/molar mass = ?
Then M Na2CO3 = mols/L (but the problem SHOULD SAY in 1.50 L of SOLUTION).
(Na^+) = 2 x (Na2CO3)
(CO3^2-) = (Na2CO3)
For ppm, convert 2.57E-4 g Na2CO3 in 1.50 L to mg/L and that will be the ppm.