kaitoufion

Thanks very much!! ^^ At least I know which area I am look for

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!!!

Oh Thank you so much~!! That's great help!

Oh i c i c~~ Thanks chuinhen!

Can someone tell me what's the difference in their Ionic Equations between: 0.1M NaOH added dropwise to 10 drops of Pb(NO3)2 & 1 drop of 0.1M Pb(NO3)2 added to 10 drops of 0.1M NaOH Thanks!

I got this question from my Chem lab: Al(NO3)3 + Na2CO3 -> white precipitates White precipitate + HNO3 -> bubbles & precipitates dissolved Can someone kindly tell me what does the Ionic Equation for the above actions would look like??? Because I'm having difficulties in writing its Ionic Equations >.< Thank you so much!

Hello, I just finished a Chemistry lab and now I need to write up a report which I am having some difficulties:-( I really hope you guys can help me out here coz it's duing tomorrow :'( Experiment 1: H2O2 + H2SO4 + KMnO4 -> little bubbles (no change in colour) Then I'm required to write down its equations which is set out like this: Oxidation: Reduction: Overall: Can someone please tell me how to write the equations in this format please??? Experiment 2: H2O2 + KMnO4 -> bubbles & brown precipitate Again I'm required to write down the equations in the above format:-( Can someone help me here please??? THANK YOU SO MUCH!!! >.<