Solutions
Solutions are homogeneous mixtures. They can be formed by mixing solids, liquids and gases. The air you breathe and the water you drink are both solutions. Solutions where the solvent is water are called aqueous solutions. Find out more... 
Your task is to design an experiment to test a range of substances for solubility in water. Task 1: Which substances are soluble in water? Find out more... Variables Starting with the variables in an experiment is a useful way of planning an investigation. Valid and reliable experiments When carrying out chemical experiments extra care must be taken. |
Copper sulfate solution  Dissolving salt in water creates a solution. In this case the water is the solvent and the salt is the solute. If some of the salt can still be seen on the bottom it is called a sediment. Some substances (such as sand) do not dissolve in water and they are called insoluble. They do not form a solution. |
The following activities are suitable for use on an interactive whiteboard (IWB). You will need Activstudio 3 to open these flipcharts. If you do not have an IWB then use the Flash alternative. 
Water is a very useful solvent. It is sometimes called the universal solvent because so many other substances dissolve in water. Dilute solutions have low concentration of solute and concentrated solutions have a high concentration of solute. Download (.pdf 6 MB) the following print resource Elements, compounds and graphs.  This website has many interesting chemistry topics to explore. Chem4kids |