This resource shows how to calculate the numbers of water of crystallisation by titration experiment. A worked example is given along with a question for you to try. The resource is embedded below so you can interact with it or click here to view resource on full screen
This resource describes how to use balanced equations in moles-mass calculations. There is a demonstration of a calculation and then one for you to try! Click on the picture to access the resource. The demonstration slides have audio so you will need headphones/speakers.
Raoult’s Law relates the vapour pressure of a solution to a pure solvent depending on how much solute is present. It can be used, subject to some limitations, for determing the molar mass of a substance. The interactive graphic below provides an overview of the experimental technique and details how the number of moles and hence molar mass of solute can be determined. One of the steps involves algebra that students can find difficult. Click on the image below to begin:
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This interactive presentation shows how simultaneous equations can be used in a variety of chemistry applications. The embedded flash videos require speakers/headphones. Along with the context-based examples, there is an overview of how to solve linear simultaneous equations. There is a quiz at the end for you to check your understanding. You can choose what elements to look at from the main menu. Click on the image to load the resource:
