What is Selenic acid?
'''Selenic acid''' is a [[chemical compound]]. It is an [[acid]]. Its chemical formul is H<sub>2</sub>SeO<sub>4</sub>. ==Properties== It is normally a colorless solution in water. It is a strong [[oxidizing agent]]. It can turn into [[selenium trioxide]] when dehydrated carefully. It is a very strong acid. It reacts with [[hydrochloric acid]] to make [[chlorine]] and [[selenous acid]]. It can dissolve [[gold]] to make gold selenate. When heated above 200°C, it releases [[oxygen]] and turns into selenous acid. It reacts with [[base (chemistry)|bases]] to make [[selenate]]s. ==Preparation== Selenic acid is made by [[oxidation]] of [[selenium dioxide]] with [[hydrogen peroxide]]. It is hard to evaporate it, but when it is evaporated, it makes colorless crystals. It can be made by oxidation of selenous acid with a strong oxidizing agent, such as [[potassium permanganate]], [[chlorine]], or [[bromine]]. The [[hydrochloric acid|HCl]] and [[hydrobromic acid|HBr]] made as a [[wikt:byproduct|byproduct]] can reduce the selenic acic to selenous acid again, though, so it has to be taken out. It can also be made by reacting [[selenium]] with [[chlorine]] in water. ==Related pages== *[[Hydrogen selenide]] [[Category:Acids]] [[Category:Selenium compounds]]