It is a little known legal requirement that pictures of moles must be included on all blog posts about stoichiometry.
Stoichiometry deals with all the stuff about the amounts of chemicals involved and produced in chemical reactions, and the ratios in which they react. It is traditionally a pain in the backside for many students but is one of those things that is too important to let yourself not understand, as it is assumed knowledge in all the other topics, and so you can’t succeed in them without it. If you are finding stoichiometry difficult, the main thing is to practice. Try working through the appropriate sections of this: Stoichiometry Questions (Edexcel). The unit will take approximately 3-4 weeks and will be assessed by a test at the end of the topic.
Presentation:
You are strongly encouraged to use this in lessons, and make notes on it. Used in conjunction with the experiments it more or less contains everything you need to know. You can download a copy by clicking on the menu icon.
Experiments and Worksheets:
- Determining Avogadros constant
- Determining an empirical formula
- Determining the Proportions of a Mixture
- Determining the Water of Crystallisation
- Determining the Molar Mass of a Gas
- Ideal Gases Circus
- Preparing a Standard Solution
- Titrations in Practice
- Numbers of Moles and Numbers of Particles
- Empirical and Molecular Formula Questions
- Ideal Gas Questions
- Theoretical Yield Questions
On The Web:
- YouTube videos explaining every part of the IB Stoichiometry topic step-by-step
- ‘Colourful’ but good notes on most aspects of stoichiometry
- Professionally produced video lessons on stoichiometry (not specfic to the IB but stoichiometry is pretty general stuff!)
If You are Really Struggling:
You may want to consider buying ‘Calculations in AS/A Level Chemistry‘ by Jim Clark (the guy who writes ChemGuide, one of the most respected chemistry study sites on the web). At time of writing the book has an average review score of 4.8/5 based on 73 reviews and costs GBP 18.50 (~MYR 95)