end of prac...
chem prac just ended today...yay...all the pracs are over! no more pracs...at least for the next 2 years...cos if i take up chemical engineering will sure have to do some lab work one...anyway...think the 4 questions went quite well larz...the double indicator titration...i got nothing to say...except for the concentration...really not carbon copy of hwa chong 2003 block test prac larz...gosh...then kinetics was straightforward...then still got QA...the carbonate...can be manganese or cobalt...manganese carbonate is light purple...cobalt carbonate is pink(according to agnes)...but i still believe is manganese larz...hehez...very funny...cos after add in hydroxide...got a pale pink ppt...i poured it out and blew at it...artificial oxidation? hehez...and it browned! =P...the FA6 i thought it was quite obvious that sulphite was present? the barium chloride one a little dubious i must say...cos most of mine dissolved and some still not dissolved...think FA6 might be lead(II) sulphite? hehez...maybe that will explain it...but heck lar...design experiment is basic gravimetric analysis...and by 450...it was over!
on the whole...i think the 3 pracs went well for me...hoping the best for the other papers...now that all the pracs are over...the main papers are coming! Ah....