Flame Tests Flashcards
1
Q
Lithium test colour
A
Crimson
2
Q
Potassium
A
Lilac
3
Q
Na
A
Yellow/ orange
4
Q
Ca
A
Brick red
5
Q
Cu
A
Green
6
Q
Alkenes burnt in air
A
- smoky flame
= produces unburnt carbon particles
= from incomplete combustion
7
Q
What do you need for hydrogenation
A
- 150C
- nickel catalyst
- reacting an alkene with hydrogen produces an alkane
8
Q
Describe hydration
A
- creates an alcohol
- water must be steam
- need 300C
- pressure around 70 atmospheres
- phosphoric acid as a catalyst
9
Q
Why is it hard to distinguish metal ions from colour of flame
A
Flame colours may mix
