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Water - Solubility - Ions

Metal Ions - Precipitate with Sodium Hydroxide - continued.

The reactions below are shown with the metal chloride
but any soluble compound could be used.
The ionic equation is also given.


aluminiumchloride+sodiumhydroxidearrowaluminiumhydroxide+sodiumchloride
 AlCl3(aq)         +         3NaOH(aq)     arrow        Al(OH)3(s)     +     3NaCl(aq)

The ionic equation is    Al3+(aq)  +  3OH-(aq)  arrow  Al(OH)3(s)

Aluminium hydroxide is white.


calcium chloride + sodium hydroxide arrow calcium hydroxide + sodium chloride.
CaCl2(aq)         +         2NaOH(aq)     arrow        Ca(OH)2(s)     +     2NaCl(aq)

The ionic equation is    Ca2+(aq)  +  2OH-(aq)  arrow  Ca(OH)2(s)

Calcium hydroxide is white.


magnesiumchloride+sodiumhydroxidearrowmagnesiumhydroxide+sodiumchloride
MgCl2(aq)         +         2NaOH(aq)     arrow        Mg(OH)2(s)     +     2NaCl(aq)

The ionic equation is    Mg2+(aq)  +  2OH-(aq)  arrow  Mg(OH)2(s)

Magnesium hydroxide is white.


copper(II) chloride+sodiumhydroxidearrowcopper(II) hydroxide+sodiumchloride
CuCl2(aq)         +         2NaOH(aq)     arrow        Cu(OH)2(s)     +     2NaCl(aq)

The ionic equation is    Cu2+(aq)  +  2OH-(aq)  arrow  Cu(OH)2(s)

Copper(II) hydroxide is blue.


iron(II) chloride + sodium hydroxide arrow iron(II) hydroxide + sodium chloride.
FeCl2(aq)         +         2NaOH(aq)     arrow        Fe(OH)2(s)     +     2NaCl(aq)

The ionic equation is    Fe2+(aq)  +  2OH-(aq)  arrow  Fe(OH)2(s)

Iron(II) hydroxide is green.


iron(III) chloride+sodium hydroxide arrow iron(III) hydroxide+sodium chloride
 FeCl3(aq)         +         3NaOH(aq)     arrow        Fe(OH)3(s)     +     3NaCl(aq)

The ionic equation is    Fe3+(aq)  +  3OH-(aq)  arrow  Fe(OH)3(s)

Iron(III) hydroxide is brown.

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