What is Tin(IV) oxide?
[[File:SnO2powder.jpg|thumb|Tin(IV) oxide]] '''Tin(IV) oxide''', also known as '''tin dioxide''' or '''stannic oxide '''is a [[chemical compound]]. Its chemical formula is SnO<sub>2</sub>. It has [[tin]] and [[oxide]] [[ion]]s in it. It has tin in its +4 [[oxidation state]]. ==Properties== It is a white powdery solid. It reacts with acids to produce [[stannic]] salts, such as [[tin(IV) chloride]] with [[hydrochloric acid]]. It reacts with strong [[base (chemistry)|bases]] to make stannites. It reacts with [[carbon]] at a high temperature to make tin metal. ==Occurrence== It is found as [[cassiterite]] in the [[mineral]] form. Cassiterite is an [[ore]] of [[tin]]. ==Preparation== It can be made in pure form by burning powdered tin in air. :Sn + O<sub>2</sub> → SnO<sub>2</sub> ==Uses== It is used to detect [[carbon monoxide]]. It is also used as a [[catalyst]] for certain reactions. It is also used to make [[ceramic]]s [[Opacity (optics)|opaque]] (not clear). It is used in [[sensor]]s of gases that can burn. A tin(IV) oxide wire is heated. When a flammable gas flows over it, it can conduct a little electricity. The sensor measures the electricity. ==Related pages== *[[Tin(II) oxide]] *[[Tin(II) chloride]] [[Category:Tin compounds]]