sentence: Selenic acid is made by oxidation of selenium dioxide with hydrogen peroxide.
sentences_after: 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 HCl and HBr made as a byproduct can reduce the selenic acic to selenous acid again, though, so it has to be taken out.
concept_name: selenic acid
headings: Selenic acid Preparation
categories: Acids Selenium compounds