Answer to Question #25204 in Physical Chemistry for bri

Question

What is the concentration (M) of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?

Answer 1

Concentration of NaCl = amountof NaCl / L

n of NaCl = 5.3 g/ 58.5 = 0.906 mol (but it is in 115 mL)

In one L concentration is 1000/115 * 0.0906 = 0.788 M