Homework Help: Chemistry

Posted by George on Saturday, September 6, 2008 at 5:35pm.

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.

Chemistry - DrBob222, Saturday, September 6, 2008 at 6:00pm
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
Chemistry - Olga, Monday, September 8, 2008 at 7:08pm
.0042
Chemistry - Dr Rachel, Thursday, July 5, 2012 at 10:15am
the answer should be in ml so...4.16 ml~ 4.2 ml

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