Thanks GROUP FLow CEART Possible ions Ba2t Ca2 Mg 1 NH42SO4

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GROUP FLow CEART Possible ions: Ba2t Ca2, Mg* (1) (NH4)2SO4 BaSQ4 white Ca, Mg (2) HCI CrO2 NH3 (3) NH3 (NH4)2C2O4 BaCrO4 yellow CaC,04 white (5) Na2HPO (4) HCI flame test brick red Ca (6) HCI magnesium reagent 2+ NaOH Mg(OH)2 dyed blue

Solution

Group iV cations-Ba2+,Ca2+, Mg2+

group reagent: (NH4)2SO4

Ba^2+(aq)+ (NH4)2SO4(aq) --->BaSO4 (s)+2NH4⁺ (aq)

BaSO4 (s)-white precipitate

confirmatory tests for Ba2+

1) Chromate test

BaSO4 (s)+HCl --->BaCl2 (aq)+H2SO4

Ba2+ +CrO4^2- -->BaCrO4 (s) --yellow ppt

Ca2+,Mg2+ remains dissolvedin the solution after addition of (NH4)2SO4(aq)

reagent added- (NH4)2C2O4+NH3

Ca²⁺ + (NH4)2C2O4----->CaC2O4(s)

flame test is the confirmatory test -brick red flame

MgC2O4 (Mg²⁺)+ NH4OH+Na2HPO4 --->Mg(NH4)PO4 (s) (magnesium ammonium phosphate)

Mg(NH4)PO4 (s)--white ppt

Mg(NH4)PO4 (s) +HCl --->Mg2+(aq)+NH4Cl(aq)+HPO4^2-(aq)

Mg2+(aq) +NaOH--->Mg(OH)2