extras Flashcards
1
Q
when would you use simple distillation
A
liquid and soluble solid
2
Q
when would you use fractional distillation
A
two or more liquids
3
Q
when would you use filtration
A
undissolved solid from liquid
4
Q
when would you use crystallisation
A
dissolved solid from liquid
5
Q
when would you use paper chromatography
A
substances with different solubilities
6
Q
practical: know how to determine the formula of a metal oxide by reduction
A
- measure boiling tube
- place it horizontally using a clamp
- add copper oxide and reweigh
- pump methane through while heating the copper 11 oxide strongly
- burn the excess gas as it comes out of a hole in the top
- when all the copper oxide has changed colour reweigh
