Answer to Question #251300 in Physical Chemistry for kynah

Question

What is the molarity of the solution produced when 145 g of magnesium chloride is dissolved in sufficient water to prepare 2.75 L of solution with a density of 2300kg/m³? 

Answer 1

1. 2300kg/m³ is density of clear magnesium chloride.
2. molar mass of magnesium chloride is 95.211 g/mol. Amount of 145 g magnesium chloride is 145.000/95.211= 1.523 mol.
3. Molarity of solution is 1.523/2.750=0,554 mol/l.
4. C_M=0,554mol/l