Chemistry Revision Notes

Acids ?         Acids from animal and plant material are called Organic acid ?         Acids that chemists have found wa click here for full revision note

Rate of Reaction ?         The amount of reaction which occurs in unit time ?         Fast reactions have high rates, an click here for full revision note

Exothermic Reactions ?         These are reactions that give out energy (mostly in the form of heat) ?         E.g. Resp click here for full revision note

Electrolysis ?         The process of decomposing a compound by passage of an electric current ?         When elements click here for full revision note

The Atom ? Smallest particle that can take place in a chemical reaction ? Consists of three sub-atomic particles, electrons, protons, neutrons Electrons ? Negatively charged, found in energy shells o click here for full revision note

Symbols of Elements ?         A letter or two letters which stand for one atom of the element ?         Element symbols click here for full revision note

Filtration ?         Used to mainly separate suspensions ?         E.g. chalk and water ?      click here for full revision note

Matter ?         Anything that has mass and occupies space (has volume) ?         Matter is composed of particles (molec click here for full revision note

The following are neccesary for the healthy growth of plants Nitrogen - protein manufacture, strong healthy leaves Phosphorous - root development Potassium - survival of frost and disease Fertilise click here for full revision note

This topic focuses on a variety of colloidal systems and stresses their importance in everday life.Colloids are a mixture, that are between true solutions and suspensions e.g milk, with butterfat dis click here for full revision note