Homework Help: CHEM HELP ASAP

Posted by Kelli on Wednesday, October 10, 2012 at 10:04am.

I figured all the parts of the problem except for the last one. Can you tell me what to do?

In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was then dissolved in 50.0 ml. of distilled water. The total mass of the solution was found to be 49.401 grams. Calculate the weight percent of the mustard in the prepared solution.
7.7

The result of a micro-scale titration showed that 3.91E-5 moles of NaOH were required to titrate a 0.775 gram sample of mustard solution to an orange-red end point.
Calculate the number of grams of acetic acid in the sample of mustard solution.
2.35×10-3

Calculate the weight percent of acetic acid in this titrated sample.
0.30

Using the information provided in the questions above, calculate the weight percent of acetic acid in the original package of mustard prepared above???

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