my side of the story... wanna hear it?: chemistry rocks...?

Wednesday, July 11, 2007

2day i did my 2nd chem practice... this practice is for me (and my class) to train our accuracy so tht when the REAL practical begins we would get da most accurate readin... not to mention tht all of us need to familiarize with da equipment/apparatus... so... 2day my experiment is about titration... da chemicals used are potassium manganese (vii) n an unknown oxalate solution of X... a formula was given n well we hav to find out wat is da average titration readin... as potassium manganese (vii) is dark purple in colour... da endin colour after da titration is a very light pink... my first readin was a rough readin as da amount of potassium managese (vii) used is jus a rough estimation... but da problem most of us faced is da temperature of da oxalate solution of X... da solution had to be heated until it reached 60 degrees celsius... so many of us got a brownish colour at da end of da experiment even though it was jus a rough estimation... however, my rough experiment turned out ok... da colour was a light pink but after half an hour to an hour later... da solution turn a light brown...!! (gasp!!) but nvrmind... i continued to do another 3 more times... this is da actual readin i need... so i had to do really carefully... most of my frens rough experiment turned brown in colour... reminds me of bah kut teh... hehehe... thankfully... my 3 experiments turned out well as da end colour is a very light pink... i took 2 photos of da experiment...

(l-r) da left most conical flask is da rough experiment followed by da next 3 expriments...

this is my last experiment... da pink is really nice... =)