Ion test

Add HNO3 (aq) Effervescence of CO2 CO3^2-(aq)+ 2H+(aq)-> CO2(aq) + H2O(l)

Add Ba^2+(aq) White precipitate of BaSO4 Ba^2+(aq) + SO4^2-(aq) -> BaSO4(s)

Add Ag^+(aq) White precipitate of AgCl If Cl- ions present, soluble in dilute NH3 (aq) Ag+(aq) +Cl-(aq) -> AgCl(aq)

Add Ag^+ (aq) Cream precipitate of AgBr If Br- ions present, soluble in conc NH3 Ag+(aq) + Br-(aq) -> AgBr(s)

Add Ag^+ (aq) Yellow precipitate of AgI If I- present, insoluble in conc NH3(aq) Ag+(aq) + I-(aq) -> AgI (s)

Add OH-(aq) and heat gently Damp red pH indicator will turn blue if NH3 is evolved NH4^+(aq) + OH-(aq) -> NH3(g) +H2O(l)

Add I-(aq) White precipitste of CuI, if Cu^2+ present I2(s) is a brown solution 2Cu^2+(aq) +4I-(aq) -> 2CuI(aq) + I2(s)

Add OH-(aq) Pale green precipitate of Fe(OH)2 which turns orange-brown in air Fe^2+(aq) +2OH-(aq) -> Fe(OH)2 (s)

Add OH-(aq) Orange-brown precipitate of Fe(OH)3 Fe^3+(aq) +3OH-(aq) -> Fe(OH)3 (s)

Add OH-(aq) Light brown precipitate of Mn(OH)2 and darkens in air Mn^2+(aq) +2OH-(aq) -> Mn(OH)2 (s)

Add OH-(aq) Green precipitate of Cr(OH)3 (s), soluble in excess NaOH forming dark green solutio n Cr^3+(aq) +3OH-(aq) -> Cr(OH)3 (s) Cr(OH)3(s) +3OH-(aq) -> [Cr(OH)6]3-(aq)