A stock solution of 10M NaOH is prepared. From this solution, you need to make 250mL of 0.375M solution. How many mL will be required? The answer if 9.4mL but I don't know how to get that.

Expert Answers

An illustration of the letter 'A' in a speech bubbles

suppose, V ml is the volume required from the stock solution,

and then the number of moles in that V will be, n1

n1 = 10 mol/dm3 x (v/1000)

n1 = v/100


This amount of moles are in 250mL of 0.375M solution,


0.375 = (v/100)/250 x 1000

0.375 = v/25

v = 9.375 mL


But the amount you can measure by a measuring cylinder (10 mL) is 9.4 mL. (0.1 mL accuracy)

Therefore the answer is 9.4 mL

See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Approved by eNotes Editorial Team