Category 5 – Ionic Compounds involving

COMPLEX IONS.

What’s a complex ion?

… a group of atoms that together make a single ion.  They have their own names.

NH₄⁺     ammonium

OH^1- hydroxide

see the ion sheet for more….

When you have four oxides note the rule:

ClO ^1-  hypochlorite

ClO₂ ^1- chlorite

ClO₃ ^1- chlorate

ClO₄ ^1- perchlorate

SO₃ ^2-  sulphite

SO₄ ^2-  sulphate

PO₃ ^3-  phosphite

PO₄ ^3-  phosphate

So when combining complex ions with any other ion, just use the same rules we know and love but make sure you name the complex ion properly and use brackets if more than one complex ion required.

Calcium   and   Hydroxide

Ca ²⁺              OH ^1-

Use criss cross or integer balancing….

     Ca(OH)₂  

Calcium hydroxide.

Ammonium     and    Oxygen

NH₄ ¹⁺                                      O ^2-

….. use the rules of criss cross or integer bal.

(NH₄ ¹⁺)₂O

Ammonium oxide

* Do practice sheet 4

Correct in class

Do  p. 55  #6,7

Quiz on all ionic compounds last 10 minutes of this class!