To what volume must a #250*mL# volume of #10*mol*L^-1# #HCl# be diluted to give a #0.050*mol*L^-1# concentration?
Before we start remember the CARDINAL RULE:
A small drop of water placed in a strong acid might spit as it heats up upon hydration (another old saw:
For your problem, we use the relationship.....
We have a starting volume of
Now this molar quantity is diluted up to give a
We solve for
AND WHEN YOU WORK WITH CONC. ACIDS YOU MUST WEAR (i) SAFETY SPECTACLES to protect your mince pies; and (ii) a LAB-COAT to protect your clothing.