Which of the following aqueous salt (NaCl)solutions has the greater concentration?
A)0.5 M
B)2.3 m
C)3.0 % by mass
D)11.1 g/L

Question

Quizplus · Accepted Answer

Molarity (M) is defined as the number of moles of solute per liter of solution. Therefore, the higher the molarity, the greater the concentration.

Option A has a lower molarity of 0.5 M.

Option B has a higher molarity of 2.3 M, so it has the greater concentration of the two options.

Option C is given as the percentage by mass, which is not the same as molarity, and therefore cannot be compared directly.

Option D is given as the concentration in grams per liter, which can be converted to molarity by dividing by the molar mass of NaCl (58.44 g/mol). Doing this calculation, we get a molarity of 0.19 M, which is lower than option B.

Which of the Following Aqueous Salt (NaCl)solutions Has the Greater