Interesting Chemistry Problems!

QUESTION 1

What is the molarity of a solution made by dissolving 3.4 moles of NaCl in enough water to make 500.0 mL of solution?

• 0.0068 M
• 6.8 M
• 34 M
• 3.4 M

Answer:

The molarity of the solution is 6.8 M.

To calculate the molarity of a solution, we use the formula:

Molarity (M) = Number of moles of solute / Volume of solution in liters

Given that there are 3.4 moles of NaCl and the volume of the solution is 500.0 mL (0.500 L), we can substitute the values into the formula:

Molarity (M) = 3.4 moles / 0.500 L = 6.8 M

Therefore, the molarity of the solution made by dissolving 3.4 moles of NaCl in enough water to make 500.0 mL of solution is 6.8 M.