![]() ![]() The word ‘stuff’ is a useful starting point: while it is not an accepted scientific term, it has tangible meaning for most students so is a useful linguistic stepping stone. When students are learning how to use technical language correctly, the number of new words to learn and the precision of use required can daunt them. Heterogeneous mixtures: large aggregations (clumps) of the substances are mixed together – eg emulsions like oil in water.Solutions are homogenous mixtures: particles of one substance (the solute) are mixed together with the particles of another substance (the solvent) – eg salty water.Homogeneous mixtures: the particles of the substances are mixed together (there is no clumping of the particles) – eg air.There are two general types of mixtures: homogeneous and heterogeneous.Mixtures can be separated by physical methods.The chemical properties of the components don’t change. If no chemical reaction occurs when two materials are mixed, they form a mixture.Mixtures are materials that contain two or more chemical substances dispersed among each other (mixed together). ![]() What do students need to know about mixtures and solutions? ![]()
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