An aqueous solution contains 171.2 g of NaCl per liter. What is the molarity of the solution?
A) 3.535 M
B) 2.930 M
C) 0.2066 M
D) 0.1712 M
E) 2.501 M

Question

Quizplus · Accepted Answer

Molarity = number of moles of solute/volume of solution in liters.
First, we need to determine the number of moles of NaCl in one liter of solution:
- 171.2 g NaCl x (1 mole NaCl/58.44 g NaCl) = 2.93 moles NaCl
Then we can use this to calculate the molarity:
- Molarity = 2.93 moles NaCl/1 L solution = 2.930 M

An Aqueous Solution Contains 171