ATOMS, IONS, FORMULAE AND BALANCED EQUATIONS
K Science - Animations - Build your own atoms and ions by dragging the subatomic particles into place.
Ionic compounds (BBC Bitesize) - Review the theory behind the formation of ions, and ionic bonding. Has animations. Pages 1-4 are most relevant.
There's a link to a short interactive video too (see Activity at the top right). The video explains electron shells and how they relate to the periodic table.
Writing Ionic Formulas: Introduction - An 11-minute video that explains how to write formulae for ionic compounds.
Writing Formulas with Polyatomic ions - Another 11 minute video. While not all the ions are ones you need, the principles are the same.
Balancing equations - Gives you equations and the boxes in which to type numbers to balance them. You've got a minute to do each one, and if you make mistakes, a chance to change them. The equations themselves are not all relevant to this topic, but the skill certainly is! Practise it until you don't make mistakes.
RATES OF REACTION
How to speed up chemical reactions (and get a date) - an analogy for the particle collision theory of rates of reaction. Covers the ways in which the rate of chemical reactions can be increased: increasing concentration, increasing temperature, increasing surface area, and catalysts.
