Question

What is the molarity of a solution made by dissolving 8.56 g of sodium acetate in water and diluting to 750.0 ml? the molar mass of sodium acetate is 82.03 g/mol?

Answer 1

Molarity is defined as the number of moles in 1 L of solution
number of moles of sodium acetate is - 8.56 g / 82.03 g/mol = 0.104 mol
number of acetate moles in 750.0 mL - 0.104 mol 
then number of acetate moles in 1000 mL - 0.104 mol / 0.7500 L = 0.139 mol/L
molarity of sodium acetate is 0.139 M