Reactions of Group 5 Cations

REACTIONS OF GROUP V CATIONS 1.Reactions of Barium ,Ba2+ 1. To a littlie of the salt solution A white precipitate is obtained . Barium carbonate is precipi- tated NH,CI,NH,OH and ammonium car- 4 BaCl2 + (NH1) CO3 bonate are added . BaCO + 2NH2CI. 2. To a little of the salt solution ace- An yellow precipitate . Barium chromate is precipitated tic acid and pottassium chromate BaCl2 +K2CrO 4 solutions are added . BaCrO + 2KCI. 3. Flame test. A green colour is imparted to the Barium salts give the character- flame. A little of the salt is mixed with istic green colouration to the conc. HCI in a watcath glass and flame introduced into a non-luminous flame.

2. Reactions of Calcium Ca2+ 1. To a little of the salt solution A white precipitate is obtained Calcium carbonate is precipi- tated NH2CI,NH,OH and (NH1)2CO are CaCl++(NH),CO, added . CaCO,+2NH,C 2. To a little of the salt solution A white precipitate. Calcium oxalate is precipitated NH2OH and ammonium oxalate are CaCl,+(NH)2C2O4 added CaC2O4 + 2NH,Cl. 3. Flame test. Calcium salts give the charac- A little of the salt is mixed with Brick red colour is imparted to teristic brick red colouration of the flame conc.HCl in a watch glass and in- the flame troduced into a non-luminous flame 3. Reactions of Strontium, Sr2+ 1. To a little of the salt solution A white precipitate. Strontium carbonate is precipit- ated NH2CI,NH2OH and are added . SrCO,+2NH,CI 2. To a little of the salt solution cal- A white precipitate is obtained . Strontium sulphate is precipi- cium sulphate is added . tated SrCl2+CaSO -Srso, +CaCl, 3. Flame test. A little of the salt is mixed with conc. HCI in a watch glass and in- A crimson colour is imparted to the flame Strontium salts impart crimpson troduced into a non-luminous flame colour to the flame