What is the molarity of sodium chloride in a solution with a density of 1.10 g ml that is 13% sodium chloride by mass?

Get the answer to your homework problem.

Try Numerade free for 7 days

We don’t have your requested question, but here is a suggested video that might help.

What is the molarity of sodium chloride (molar mass of NaCl = 58.45 g/mol) in a solution that is 13.0 % by mass sodium chloride and that has a density of 1.10 g/mL? A) 2.45 M B) 2.56 M C) 143 M D) 2.23 M E) 1.43 x10-2 M

Answer:

molarity: 2.4 M

Explanation:

1. Suppose you have 100 mL de solution:

Use density to find grams of soluton:

100 mL solution x (1.10 g / 1 mL) = 110 g solution

2. FInd the amount of sodium chloride pure:

110 g solution x(13 g NaCl / 100 g solution) = 14.3 g NaCl

3. Change grams to mol:

14.3 g NaCl x ( 1 mol NaCl/ 58.44 g NaCl) = 0.24 mol NaCl

4. Molarity:

M = mol NaCl / L solution

M = 0.24 mol NaCl / 0.1 L = 2.4 M