Question

What is the final volume, in milliliters, when 5.80 mL of 25.0 %(m/v) NaOH solution is diluted to give a 3.50 %(m/v) NaOH solution.

Answer 1

41.43 mL

Step-by-step explanation:

First we calculate the mass of NaOH in the original solution:

• 25.0 % m/v means that in 100 mL of solution, there are 25 grams of NaOH.

• This means that in 5.80 mL, we would have (5.80 * 25/100) 1.45 grams of NaOH.

Then we calculate the volume of the diluted solution, using the grams of NaOH (that remain the same throughout the dilution process):

• 1.45 g NaOH *
  `(100 mL)/(3.50gNaOH)` = 41.43 mL