Rubidium hydrogen sulfate
Rubidium hydrogen sulfate, sometimes referred to as rubidium bisulfate, is the half neutralized rubidium salt of sulfuric acid. It has the formula RbHSO4.
Properties
It is a hygroscopic compound.Its crystals are isomorphs with ammonium hydrogen sulfate crystals.
Its enthalpy of solution is 15.62 kJ/mol.
After warming up it decomposes to rubidium disulfate and water:
Synthesis
It may be synthesised with water and a stoichiometric amount of rubidium disulfate. Reaction takes place where there is no humidity:There is another method of creation. It is similar to the synthesis of sodium sulfate and potassium sulfate. This reaction requires rubidium chloride and a little bit of warm sulfuric acid. Some hydrogen chloride is also produced during the reaction.