What is the final volume of a 3.5M NaOH solution if the original solution was 20mL of a 7.00M NaOH solution

0.04 L (or 40 mL)

Explanation:

The dilution equation is:

= the molarity of the sock solution

= the volume of the sock solution

= the molarity of the diluted solution

= the volume of the diluted solution  

We are given the original, or stock, solution, which is , and . We are also given the final molarity, which is: .

So, plugging our given into the dilution equation, results in:  

(divide both sides by 3.5 M, in order to get by itself).

So, the final volume of a 3.5 M NaOH solution, with an original solution of 20 mL of a 7.00 M NaOH solution, is 0.04 L (or 40 mL)

Hopefully this helped. Good luck!