Slide 1

MEETING 4 ANALYSIS QUALITATIVE CATION

Slide 2

Scale of Qualitative Analysis a. Macro analysis: 0,5-1 gram sample per 20 mL solution b. Semimicro analysis : 0,05 gram sample per1 mL solution c. Micro analysis: 5 mg sampel per 0,1 mL solution

Slide 3

Li + Na + Cu 2+ 1. Flame Test

Slide 4

How to do? - Immerse the cleaned platinuum/ nichrom wire into HCL concentrate. - Put into the bunsen flame (in the oxidation flame) - Do the 2 step 2x - Immerse the cleaned platinuum/ nichrom wire into HCL concentrate. - Touched into the sample - Put into the bunsen flame - Observe the flame color

Slide 5

Flame colorFlame color (Cobalt glass) Cations yellow Purple/orange Red-yell/ orange Dark red Green-yellow Bloody red Turquois blu Orange Yellow-red colorless Dark red Light green purple Green-blue Dark red Na K Ca Sr Ba Li Zn Cr Co

Slide 6

SPOT TEST ANALYSIS Ca(II) : + (NH4)CO3 + C 2 O 4 2-