Topic 5 Testing for Cations + Anions ( All) Flashcards
Li+
Flame Test- Red flame
Na+
Flame test- Yellow flame
K+
Flame Test- Lilac flame
Ca2+
Flame test- Orange-red Flame
Cu2+
Flame test- Blue-Green Flame
Fe 2+
Add Sodium hydroxide - green ppt (Iron (II)hydroxide)
Fe 3+
Add Sodium hydroxide - brown ppt ( Iron (III) hydroxide)
Cu 2+
Add Sodium hydroxide - blue ppt ( copper (II) hydroxide)
NH4 +
Add Sodium hydroxide - No ppt- Warm- damp red litmus paper -> blue
Cl-
Add dilute nitric acid- add silver nitrate- white ppt ( Silver Chloride)
Br-
Add dilute nitric - add silver nitrate- cream ppt( Silver bromide)
I-
Add dilute nitric acid- add silver nitrate - yellow ppt( silver iodide)
SO4 2-
add nitric acid- add barium chloride - white ppt ( barium sulfate)
CO3 2-
Add nitric acid- effervescence- bubble through lime water- cloudy.