Chromium(III) oxide, Cr2O3\text{Cr}_2\text{O}_3Cr2O3, is reduced to chromium metal by heating with aluminium. Determine the minimum mass of Al\text{Al}Al required to completely reduce 114 g114\text{ g}114 g of chromium(III) oxide.
(Use the relative atomic masses: Cr=52.0\text{Cr} = 52.0Cr=52.0, Al=27.0\text{Al} = 27.0Al=27.0, O=16.0\text{O} = 16.0O=16.0)
199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.