nope. the H2SO4 was for chem. i don't see why school students can't use it. just use the fume cupboard:p
regarding the liquid nitrogen, we did this prac at the uni. our chem teacher who left in term 2 wouldn't buy liquid nitrogen, even tho it was perfectly legal. she couldnt trust us:D
yep thats exactly what we did; liquid nitrogen :D and i think its the most "appropriate" way
um safety: try not to touch it if u can; its quite tempting
goggles-? we didn't use em hehe
gloves
that 15M ammonia we used in the uni lab brought back sweet memories of last years usyd excrusion *hiiigh hehe; search for it if u wanna know. there wasa thread last year