1. Recently I've done an experiment and we are required to determine the percentage NH3 in the complex by mass.

I had no problem doing the experiment but stuck in the calculation part

Really hope someone can help me here!!! >.<

The experiment was done by titration, the complex we used is... (CuSO4*5H2O + H2O + NH3 + ethanol + acetone) - sorry I don't know how I should call this @.@ But those are the things we used to make that complex...

First I dissolved 0.2g of the complex with 25mL H2O, & 31.05mL of standardized 0.1M HCl was used to titrate it. Then we are required to find "%NH3"......

Can someone please kindly tell me (at least the formula that I need to use) to calculate the percentage NH3???? :'(

Thanks so much!!! :wink:

2.

3. um, for titrations, and we had to find, either the conc, volume or molarity we used...

v1 * m1 over n1 = = v2 * m2 over n2

V=VOLUME(one given one ot be worked, or both given)
M=MOLARITY (one given one to be worked or both given)
N= NUMBEROF MOLES (always was given)

any help?

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