again...

ya like always.. LOL

Lmao.

let me guess, kinematics...

rmb wrong la -.-

technique not used enough la, Darren

Hahaha ya true, he blurblur one.

reminds me: Darren, still can remember why we add nitric acid to a salt when testing for Cations ? *Don't help him!*

test for carbonate ions

gd, you remember. Thn test for Zn 2+ ?

rise hand*

raise* LOL

LOL

Go ahead bah. I still think he checking.

uhmmm izzit add the NaOh & NH3 one? LOL i nt v sure actually :/

add NaOH, shld dissolve if is Zn, Pb or Al. Thn use fresh sample, add NH3 (aq) only Zn shld dissolve.

tht is, thee ppt dissolve

of course, tht's upon addition of more NaOH/NH3 (aq)

okie thanks