Question

What is the concentration of a NaCl solution that is prepared by dissolving 14.61 g of NaCl in 500.0 mL of water

Answer 1

Answer:

0.029 g/mL or 0.5 M

Explanation:

The concentration in g/mL is:

• 14.61 g / 500.0 mL = 0.029 g/mL

As for calculating the molar concentration, first we convert 14.61 g of NaCl to moles, using its molar mass:

• 14.61 g ÷ 58.44 g/mol = 0.25 mol

Then we divide the number of moles by the volume in liters:

• 500 mL / 1000 = 0.5 L

• Molarity = 0.25 mol / 0.5 L = 0.5 M