Question

0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution. What is the molarity?

A) 1 M
B) 5 M
C) 10 M
D) 15 M

Answer 1

To calculate molarity, divide the number of moles of the solute by the volume of the solution in liters. For 0.5 moles of sodium chloride dissolved in 0.05 liters of the solution, the molarity is 10 M, making the correct answer C) 10 M.

Step-by-step explanation:

The question is asking about the calculation of the molarity of a sodium chloride solution. Molarity is a way to express the concentration of a solution, and it is defined as the number of moles of solute (in this case, sodium chloride) per liter of solution. We find molarity by dividing the number of moles of sodium chloride by the volume of the solution in liters.

Using the provided information:

• Number of moles of sodium chloride (NaCl) = 0.5 moles
• Volume of the solution = 0.05 liters

The molarity (M) is calculated as follows:

M = moles of NaCl / liters of solution

M = 0.5 moles / 0.05 liters

M = 10 M

Therefore, the correct answer is C) 10 M.