These different types of mixtures are interesting but might not be essential knowledge for GCSE Chemistry. The descriptions are non-technical (omitting details, e.g. of particle sizes), but sufficient for general comparison. Thesubstancesof which a mixture is formed can sometimes be identified visua...
Most metals react with dilute acids to produce a salt and hydrogen gas. Extraction of metals Most metals are only found as compounds because the metal has reacted with other elements in the past. Because of this, the metal has to be extracted from the ore (rock) where the metal compound ...