How did Chem Paper 33 went???

[safeasmothersmilk]

I pray that you all get good grades!!!

thanks =)

hey guys btw what was the % uncertanity????

yesyes what about percentage uncertainty? i looked at the sticker at the bottom of the balance and i read 0.01 which i'm certain was the uncertainty of the balance. i think.
%error: [(0.01*2)/mass]*100

can anyone confirm this because i have no idea if that's even remotely right.

 

[bloodyhel]

whats the maximum a person can get if they got like 15 out of 40 in the practical????

 

[angelicsuccubus]

no idea what u guys are talking about..
but as far as i could tell and most of my friends too.. we got FA6 as br- and NH4+ and FA7 as Ba+ and SO4^2-

 

[smj]

Guys if we were given NaCO3 as FA5 then no gas should have evolved coz theoretically group1 metal carbonates do not decompose easily.
By the way to ustav156 and intel1993 the cation was H+ ion which is checked by adding FA7 to yellow K2Cr2O7 which turns to orange K2Cr2O7

 

[Hateexams93]

NO ur wrong , SO2 gas turns it orange , not H+ , i got Ba+ for that cation

 

[utsav156]

hey every onez getting different answer!!!!!!
whts is the correct one?????