SASS Chem Ionic Cmpds Summary

Page 1 NH4NO3✓/✘colourless keychemical formula insoluble in water (ppt)soluble in water (aq)appearance ST ANDREW’S SECONDARY SCHOOL NAME CLASS CHEMISTRY 6092 Chemical Data of Common Ionic Compounds: A Summary Solubility, colour, chemical analysis Cations Chemical Analysis NH4+ Na+ (K+) Ba2+ Ca2+ Al3+ Fe2+ Fe3+ Cu2+ Zn2+ Pb2+ Ag+ Anions NO3- NH4NO3 ✓ colourless NaNO3 ✓ colourless Ba(NO3)2 ✓ colourless Ca(NO3)2 ✓ colourless Al(NO3)2 ✓ colourless Fe(NO3)2 ✓ green Fe(NO3)3 ✓ yellow Cu(NO3)2 ✓ blue Zn(NO3)2 ✓ colourless Pb(NO3)2 ✓ colourless AgNO3 ✓ colourless NH3 gas evolved when warmed with aq. NaOH and Al foil. CO32- (NH4)2CO3 ✓ colourless Na2CO3 ✓ colourless BaCO3 ✘ white CaCO3 ✘ white FeCO3 ✘ pale green CuCO3 ✘ green ZnCO3 ✘ white PbCO3 ✘ white Ag2CO3 ✘ white Effervescence observed with dilute acid. CO2 gas evolved forms white ppt in limewater. SO42- (NH4)2SO4 ✓ colourless Na2SO4 ✓ colourless BaSO4 ✘ white CaSO4 ✘ white Al2(SO4)3 ✓ colourless FeSO4 ✓ green Fe2(SO4)3 ✓ yellow CuSO4 ✓ blue ZnSO4 ✓ colourless PbSO4 ✘ white Ag2SO4 ✘ white White ppt formed with acidified aq. Ba(NO3)2. OH- NaOH ✓ colourless Ba(OH)2 ✓ colourless Ca(OH)2 ✘ white Al(OH)3 ✘ white Fe(OH)2 ✘ green Fe(OH)3 ✘ red-brown Cu(OH)2 ✘ blue Zn(OH)2 ✘ white Pb(OH)2 ✘ white Red litmus paper turns blue / use pH paper. Cl- NH4Cl ✓ colourless NaCl ✓ colourless BaCl2 ✓ colourless CaCl2 ✓ colourless AlCl3 ✓ colourless FeCl2 ✓ green FeCl3 ✓ yellow CuCl2 ✓ green ZnCl2 ✓ colourless PbCl2 ✘ white AgCl ✘ white White ppt formed with acidified aq. AgNO3. Br- NH4Br ✓ colourless NaBr ✓ colourless BaBr2 ✓ colourless CaBr2 ✓ colourless AlBr3 ✓ colourless FeBr2 ✓ green FeBr3 ✓ brown CuBr2 ✓ yellow-green ZnBr2 ✓ colourless PbBr2 ✘ white AgBr ✘ cream Cream ppt formed with acidified aq. AgNO3. I- NH4I ✓ colourless NaI ✓ colourless BaI2 ✓ colourless CaI2 ✓ colourless AlI3 ✓ colourless FeI2 ✓ green ZnI2 ✓ colourless PbI2 ✘ yellow AgI ✘ yellow Yellow ppt formed with acidified aq. AgNO3. Chemical Analysis NH3 gas evolved when heated with aq. NaOH. Flame test Na+ : Yellow K+. : Lilac (1) White ppt formed with acidified aq. Na2SO4. (2) Compare solubility of its OH- : ↟. (vs Ca2+) (1) White ppt formed with acidified aq. Na2SO4. (2) Compare solubility of its OH- : ↡. (vs Ba2+) (1) White ppt formed with aq. NH3, insoluble in excess aq. NH3. (2) No rxn with aq. NaCl. (vs Pb2+) Green ppt formed with aq. NaOH, insoluble in excess aq. NaOH. Red-brown ppt formed with aq. NaOH, insoluble in excess aq. NaOH. Light blue ppt formed with aq. NH3, soluble in excess aq. NH3 giving a dark blue solution. White ppt formed with aq. NH3, soluble in excess aq. NH3 giving a colourless solution. (1) White ppt formed with aq. NH3, insoluble in excess aq. NH3. (2) White ppt formed with aq. NaCl. (vs Al3+) White ppt formed with aq. NaCl.