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December 22, 2014

Homework Help: chemistry, please help!

Posted by Tina on Monday, May 2, 2011 at 12:46am.

Given:
1. Mass of oxalic acid + weighing paper
2.0355g
2. Mass of weighing paper
0.5219 g
3.volume of oxalic acid solution
250 mL
5. Volume of oxalic acid used in titration
trial 1: 15.o mL Trial 2: 15.0 mL
6. Volume of NaOH solution used in titration:

Trial 1: 12.1 mL trial 2: 12.0 mL


Questions:
1. Mass of oxalic acid
2. molecular weight of oxalic acid
3. number of moles of oxalic acid
4. molarity of oxalic acid
5. number of moles of oxalic acid used in each trial
6. number of moles of NaOH at equivalence point
7. Molarity of NaOH _____M ____M
8. Average of 2 closest trials M NaOH=

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