Aluminium dichromate is an inorganic compound used in specialized anti-corrosion coatings. It is composed of aluminium ions, Al3+\text{Al}^{3+}Al3+, and dichromate ions, Cr2O72−\text{Cr}_2\text{O}_7^{2-}Cr2O72−.
What is the chemical formula for aluminium dichromate?
Al3(Cr2O7)2\text{Al}_3(\text{Cr}_2\text{O}_7)_2Al3(Cr2O7)2
Al2Cr2O7\text{Al}_2\text{Cr}_2\text{O}_7Al2Cr2O7
Al2(Cr2O7)3\text{Al}_2(\text{Cr}_2\text{O}_7)_3Al2(Cr2O7)3
Al2Cr6O21\text{Al}_2\text{Cr}_6\text{O}_{21}Al2Cr6O21
74 exam-style questions on OCR GCSE Chemistry Bonding. Each one has a worked solution and a mark scheme showing where the marks go.