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April 17, 2014

Homework Help: ap chemistry

Posted by chris on Thursday, October 2, 2008 at 10:19pm.

please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples:

1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M HCl solution?

2. You wish to determine the molarity of a solution of NaOH. To do this, you titrate a 25.00 mL aliquot of your sample, which has had 3 drops of phenolphthalein indicator so it is pink, with 0.1067 M HCl. The sample turns clear (indication the NaOH has been neutralized with the HCl solution) after the addition of 42.95 mL of the HCl. Calculate the molarity of the unknown concentration of NaOH solution.

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