posted by George on .
You have a 12 M solution of hydrochloric acid. How many milliliters of this solution will give 25.0 mL of 2.0 M hydrochloric acid when diluted?
Very confusing, If I can get a step by step process on how to figure this out, that would be great.
Just remember the definition of molarity.
molarity = # mols/liter of solution.
What do you want? 25 mL x 2.0 M = 0.025 L x 2.0 M = ??moles HCl.
12 M x ?liters = mols from above. Solve for liters. OR, you can do this all in one step.
12 M x mL = 25.0 mL x 2.0 M
the answer should be in ml so...4.16 ml~ 4.2 ml