Rubidium hydrogen sulfate

Rubidium hydrogen sulfate

rubidium ion
hydrogen sulfate ion
Identifiers
CAS Number	15587-72-1
3D model ( JSmol )	Interactive image
ChemSpider	141556
ECHA InfoCard	100.036.029
EC Number	239-649-1
PubChem CID	23689122
CompTox Dashboard (EPA)	DTXSID40165980
InChI InChI=1S/H2O4S.Rb/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+1/p-1 Key: SCWZRXZHBXDDBE-UHFFFAOYSA-M
SMILES OS(=O)(=O)[O-].[Rb+]
Properties
Chemical formula	RbHSO4
Molar mass	182,54 g/mol−1
Appearance	Crystals with no colour[1]
Density	2.89 g·cm−3
Melting point	214 °C (417 °F; 487 K)[2]
Related compounds
Other cations	rubidium oxide rubidium hydroxide
Related compounds	rubidium sulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Rubidium hydrogen sulfate, sometimes referred to as rubidium bisulfate, is the half neutralized rubidium salt of sulfuric acid. It has the formula RbHSO₄.

Synthesis

It may be synthesised with water and a stoichiometric amount of rubidium disulfate. Reaction takes place where there is no humidity:^[3]

${\displaystyle {\ce {{Rb2S2O7}+ H2O -> 2RbHSO_4}}}$

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.

${\displaystyle {\ce {{H2SO4}+ RbCl -> {RbHSO4}+ HCl}}}$

Properties

It is a

After warming up it decomposes to rubidium disulfate and water:^[7]

${\displaystyle {\ce {2RbHSO4 -> Rb2S2O7 + H2O}}}$

Like potassium and caesium, rubidium has another hydrogen sulfate compound as well: Rb₃H(SO₄)₂.

References