TABULATE Test | Observation | Inference
Sample C + water 5cm^3 of C + NaoH in drop and in excess |
soluble white gelatinous precipitate in drop. White soluble or dissolve (in excess).
Soluble salt. Zn^2+ or Al^3+ present.
5cm^3 of C + NH4OH in drop, then in excess.
white gelatinous precipitate in drop. White gelatinous ppt dissolve in excess.
Zn^2+ or Al^3+ present. Zn^2+ confirmed (in excess).
Solution of sample C + dilute HN3 + BaCl2(aq) + HCl(aq)
No visible reaction. White ppt form. White ppt insoluble in dilute Hcl.
SO3^2- or SO4^2- may be present. SO4^2- confirmed.
Sample D + dilute Hcl(aq)
A colourless and odourless gas evolve with a effervescence. The gas turn like water milky. The gas turn blue litmus to red.
The gas in CO2 from CO3^2- or HCO3-