Question

If you dissolve 24.4 g of NaCl in 251 g of water and generate a solution that has a density of 1.10 g/mL, what is the molarity of NaCl in this solution? Enter a numerical value in the correct number of significant figures. Do not enter units in the answer box, but understand that the unit needed for the final answer is M.

Answer 1

Answer:

The molarity of this NaCL solution is 1.83 M:

Explication:

Step 1: Data  given

Mass of NaCl = 24.4 grams

Mass of water = 251 grams

Density of water = 1.10 g/mL

Step 2: Calculate volume of water

Volume of water = Mass of water / density of water

Volume of water = 251 grams / 1.10 g/mL

Volume of water = 228.18 mL =0.22818L

Step 3: Calculate moles NaCl

Number of moles NaCl = 24.4 grams / 58.44 g/mol

Number of moles = 0.4175 moles

Step 4: Molarity of the solution

Molarity = Number of moles / Volume

Molarity = 0.4175 moles / 0.22818 L

Molarity = 1.83 M

The molarity of this NaCL solution is 1.83 M