JustMeWayne

this is the 51st Post!
Actually was hoping that the 50th post would not be about something unpleasant, but it is
anyway, more about the chem practical test we had today
we did the theory part today which comprises 80% of the whole paper! tomorrow ill post about the practical part hehe
anyway, we had to write down the procedure to seperate these 3 samples : charcoal, iron fillings, and copper (II) sulphate.
so in brief,
to obtain iron fillings , use magnet,
add water to copper2sulphate and charcoal mixture, filtrate through so that the soluble copper2sulphate would be collected as filtrate and charcoal collected as residue
afterwards, leave charcoal to dry
then boil filtrate till saturated and allow for evaporation and crystalization
but i 4got to write that we were supposed to "wash" the copper2sulphate crystals after the crystalization. in other words, to add a bit of water to purify it. hopefully will get good marks haha
wish me good luck
then as i was coming home from sch with lihong, we were debating on the Cut off point for each respective school during psle.
in the end i won the argument with this :
example 100 people want to enter XXXsch, but XXXsch only have 50 places
therefore, to enter that sch, you would need to be in the upper 50 of the 100 hopefuls.
the school will rank your scores in order, and pick the top 50 only. therefore, i concluded that your entrance to the school is dependant on your position among the applicants. even if you score 299, but the top 50 out of 100 all score 300, you wont get a place =.=

therfore, to calculate the COP, we get the 50th pupil ( the last pupil) who managed to enter the school's PSLE score.
in other words:
49th person = 256
50th person= 255
51th person = 254
the COP is therefore 255, and the 51th person didnt manage to enter.

hehes

convincing arguement rite?!?