Insoluble Hydroxides

SOLUBILITY

it plays a role, as certain cations within compounds do not dissolve w/ certain conditions, these depends on which group they are located in. it is based on their polarity, temperature, pressure added, and their molecular size

INSOLUBILITY

plays a part in which a solute does not dissolve in a solvent, but in certain situations it may dissolve and become soluble. it may be seen as a separation method in which one may want to separate a certain metal cation from a compound mixture

Cation: Al+3 (Al2(SO4)3

Color: Colorless to white

Composition of ppt: Al(OH)3

NaOH: -

NH4OH: -

NH4Cl: -

Cation: Cu+2 (CuSO4)

Color: Light blue

Composition of ppt: Cu(OH)2

NaOH: -

NH4OH: +

NH4Cl: -

Cation: Fe+3 (FeCl3)

Color: Yellow

Composition of ppt: Fe(OH)3

NaOH: -

NH4OH: -

NH4Cl: -

Cation: Mn+2 (MnCl2)

Color: Yellow orange

Composition of ppt: Mn(OH)2

NaOH: -

NH4OH: +

NH4Cl: +

Cation: Zn+2 (ZnSO4)

Color: White

Composition of ppt: Zn(OH)2

NaOH: -

NH4OH: +

NH4Cl: -

Cation: Cd+2 (CdCl2)

Color: white

Composition of ppt: Cd(OH)2

NaOH: -

NH4OH: +

NH4Cl: +

Cation: Zn+2 (ZnSO4)

Color: White

Composition of ppt: Zn(OH)2

NaOH: -

NH4OH: +

NH4Cl: -

Cation: Mg+2 (MgSO4)

Color: White

Composition of ppt: Mg(OH)2

NaOH: -

NH4OH: -

NH4Cl: +

Cation: Ni+2 (Ni(NO3)2)

Color: Light green

Composition of ppt: Ni(OH)2

NaOH: -

NH4OH: +

NH4Cl: -

Cation: Ag+ (AgNO3)

Color: Brown

Composition of ppt: Ag(OH)

NH4OH: -

Cation: Hg+2 (HgCl2)

Color: Yellow

Composition of ppt: HgO

NH4OH: -

Cation: Hg2+2 (Hg2(NO3)2)

Color: Black

Composition of ppt: Hg2O

NH4OH: -

Cation: Co+2 (Co(NO3)2)

Color: Blue

Composition of ppt: Co(OH)2

NaOH: -

NH4OH: -

Cation: Al+3 (Al2(SO4)3

Color: White

Composition of ppt: Al(OH)3

NaOH: -

NH4OH: -

Cation: Pb+2

Reagent used: Pb(NO3)2

Color: colorless to white

Composition of ppt: Al(OH)3

HCl: -

NH4OH: -

Cation: Mg+2

Reagent used: MgSO4

Color: colorless to white

Composition of ppt: Cu(OH)2

HCl: +

NH4OH: -

Cation: Hg+2

Reagent used: HgCl2

Color: orange

Composition of ppt: Fe(OH)3

HCl: +

NH4OH: -

Cation: Ni+2

Reagent used: NiCl2

Color: green

Composition of ppt: Mn(OH)2

HCl: +

NH4OH: -

Cation: Zn+2

Reagent used: ZnCl2

Color: white

Composition of ppt: Zn(OH)2

HCl: +

NH4OH: -

Cation: Co+2

Reagent used: Co(NO3)2

Color: white

Composition of ppt: Cd(OH)2

HCl: -

NH4OH: -

Cation: Cu+2

Reagent used: White

Color: White

Composition of ppt: Fe(OH)3

HCl: -

NH4OH: -