These downloadable videos and animations are part of the multimedia package Stuff and Substance, developed by the Gatsby Science Enhancement Programme (SEP). They can be used to introduce the idea of solubility. Solubility is the amount of a substance that will dissolve in a certain amount of solvent.
Students can confuse solubility with the rate of dissolving. The animation shows only so much of a substance dissolving no matter how long the stirring. Videos featuring benzoic acid and alum show a change in solubility with temperature and how this can be used to grow crystals.
The two other videos use propanone as the solvent to show how solubility also depends on the solvent. These video and animation files form part of the resources in the section Stuff and Substance multimedia package, which provides a series of interactive pages that can be used by teachers or students in the classroom.
Please note: From 2021, Adobe has discontinued support for Flash player and as a result some interactive files may no longer be playable. As an alternative method to accessing these files a group of volunteers passionate about the preservation of internet history have created project Ruffle (https://ruffle.rs/). Ruffle is an entirely open source project that you can download and run many interactive Flash resources. For further information regarding STEM Learning’s policy for website content, please visit our terms and conditions page.
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