Question

Determine the molarity of a solution containg 10.6g of sodium carbonate dissolved in 250cm of distilled water (Na=23,C=12,0=16)

Answer 1

Molar mass of sodium carbonate = 23 + 12 + (3 x 16) = 105 g/mol

10.6 g / 105 g/mol = 0.101 mol

Molarity = 0.101 mol / 0.250 L = 0.404 M