Test for ions

(CO3)2-

(CO3)2-

Add H+ forming CO2, bubbling

(SO4)2-

Add Ba(NO3)2 and form BaSO4 white precipitate

Halide ions

Add AgNO3

Cl- form white precipitate, dissolve in dilute NH3

Br- form cream precipitate, dissolve in concentrated NH3

I- form yellow precipitate, do not dissolve

NH4+

Warm and add NaOH, NH3 forms which turns red litmus blue