C12

Question 1

Chromatography

Answer 1

• physical change no chemical reactions taken place
• works from solubility
• paper = stationary phase
• solvent = mobile phase ( SOLVENT dissolves substances)
  the chemical is attracted to the stationary phase
  weakly attracted chemicals = move far up
  strongly attracted chemicals = not far
  Mixture = more than 2 dots
  pure substance = 1 dot

Question 2

Flame tests METAL IONS

Answer 2

sodium (so damn loud) = yellow
copper = green
lithium (lipstick) = crimson
lilaK = potassium
calcium Calum ScOt = orange red 

might not work because:
- low concentration or mixture
use flame emission spectroscopy (faster, accurate, sensitive)