Hydrogen fluoride is a gas which when in solution with water forms hydrofluoric acid, HF. ... Like it's sister, HCl acid, it reacts with water with the release of heat andcan cause burns on the skin. What can HF dissolve? Hydrofluoric acid attacks the silicon oxide in most types of ...
An unknown sample does not react with 2,4-dinitrophenylhydrazine reagent, but a color change is observed on reaction with ceric nitrate reagent. Assume that the reagent is added to simple salt: Concentrated sulphuric acid and manganese(IV) oxide were added to ...