Chemicals

What is it?

A pure substance is a single element or compound not mixed with any other substance. Pure substances have specific melting and boiling temperatures. These can be used to distinguish pure substances from mixtures. A formulation is a mixture that has been designed as a useful product. Formulations are made by mixing the components in carefully measured quantities to ensure that the product has the required properties.

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Chromatrography

Can be used to separate mixtures. It involves a stationary phase and the mobile phase. The ratio of the distance moved by a compound can be expressed as its Rf value.

RF= distance moved by substance distance moved by solvent

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Test for oxy

Glowing splint into a test tube for the splint relights

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Test for hydrox

Sodium hydroxide solution can identity metal ions. Carbonates react with dilute acids. Sulfate ions produce with precipitate.

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