Question

diluted to 200 mL, will have the largest concentration? View Available Hint(s) The four following concentrated solutions are each diluted with water to form 200 mL of a dilute solution. Which solution, once diluted to 200 mL, will have the largest concentration? 100.0 mL of a 0.1 M NaOH solution 20.0 mL of a 0.4 M NaOH solution 80.0 mL of a 0.2 M NaOH solution. 10.0 mL of a 0.5 M NaOH solution

Answer 1

Answer:

80.0 mL of a 0.2 M NaOH solution.

Explanation:

• To solve this problem, we must mention that the no. of millimoles of the substance is equal before and after dilution.

(MV)before dilution = (MV)after dilution.

We need to calculate the concentration after the dilution for each solution:

• 100.0 mL of a 0.1 M NaOH solution:

M after dilution = (MV)before dilution/V after dilution = (0.1 M)(100.0 mL)/(200.0 mL) = 0.05 M.

• 20.0 mL of a 0.4 M NaOH solution:

M after dilution = (MV)before dilution/V after dilution = (0.4 M)(20.0 mL)/(200.0 mL) = 0.04 M.

• 80.0 mL of a 0.2 M NaOH solution:

M after dilution = (MV)before dilution/V after dilution = (0.2 M)(80.0 mL)/(200.0 mL) = 0.08 M.

• 10.0 mL of a 0.5 M NaOH solution:

M after dilution = (MV)before dilution/V after dilution = (0.5 M)(10.0 mL)/(200.0 mL) = 0.025 M.

So, 80.0 mL of a 0.2 M NaOH solution will have the largest concentration after dilution to 200.0 mL.