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September 1, 2015

Homework Help: science(chem)

Posted by ~christina~ on Sunday, December 2, 2007 at 4:11pm.

I did a dehydration rxn with 1.424g of 4-methylcyclohexanol with .40ml 85% H3PO4 and 6 drops of concentrated H2SO4.

I have to calculate the limiting reagent even though I do suspect it to be the 4-methylcyclohexanol.

I do know the ratio is 1mol H3PO4: 3mol 4-methylcyclohexanol.

However even though I have the weight of my 4-methylcyclohexanol I have the ml of my H3PO4 I added.

.40ml 85% H3PO4

I was wondering how do I calculate how many moles I have of it. Can I just use the density to convert it or not?
I was wondering that since it isn't full strength but 85% H3PO4. Would that affect the calculations?

Thank You

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