How many liters of water would you have to add to this solution to reduce the molarity you calculated in Part A by a factor of two?

To reduce the molarity by a factor of two, you would need to double the volume of the solution (since molarity is inversely proportional to volume).

If the volume of the solution is currently 500 mL, you would need to add 500 mL of water to double the volume to 1000 mL (1 liter).