What is the concentration (M)of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?
A) 0.091 M
B) 5.3 M
C) 0.79 M
D) 5.5 M
E) 0.115 M

Question

Quizplus · Accepted Answer

First, we need to convert the mass of NaCl to moles:

5.3 g NaCl x (1 mol NaCl/58.44 g NaCl) = 0.0906 mol NaCl

Next, we need to convert the mL of solution to L:

115 mL x (1 L/1000 mL) = 0.115 L

Finally, we can use the definition of molarity to calculate the concentration:

Molarity = moles of solute / liters of solution

Molarity = 0.0906 mol NaCl / 0.115 L = 0.79 M NaCl

What Is the Concentration (M)of a NaCl Solution Prepared by Dissolving