:Rubidium perchlorate

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 464384370

| ImageFile = rubidium perchlorate.png

| ImageSize = 120px

| IUPACName = Rubidium perchlorate

| OtherNames = Perchloric acid rubidium salt,
Rubidium chlorate(VII), Rubidii perchloras (lat.)

|Section1={{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 145966

| InChI = 1/ClHO4.Rb/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1

| InChIKey = NQYGGOOZLKJKPS-REWHXWOFAS

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/ClHO4.Rb/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = NQYGGOOZLKJKPS-UHFFFAOYSA-M

| CASNo_Ref = {{cascite|changed|??}}

| CASNo = 13510-42-4

| EINECS = 236-840-1

| PubChem = 23673707

| SMILES = [Rb+].[O-]Cl(=O)(=O)=O

}}

|Section2={{Chembox Properties

| Formula = RbClO4

| MolarMass = 184.918 g/mol

| Appearance = Colorless crystals

| Density = 2.878 g/cm3
2.71 g/cm3 over 279 °C

| MeltingPtC = 281

| BoilingPtC = 600

| BoilingPt_notes = (decomposes)

| Solubility = see chart

| SolubilityProduct = 3{{e|−3}}{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=1138561630 |pages=5–189|edition=99 |language=English}}

}}

|Section3={{Chembox Hazards

| MainHazards =

| NFPA-H = 2

| NFPA-F = 0

| NFPA-R = 0

| NFPA-S = OX

| GHSPictograms = {{GHS03}}{{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|272|302|315|319|332|335}}

| PPhrases = {{P-phrases|210|220|221|261|264|270|271|280|301+312|302+352|304+312|304+340|305+351+338|312|321|330|332+313|337+313|362|370+378|403+233|405|501}}

| FlashPt =

| AutoignitionPt =

}}

| Reference = F. Brezina, J. Mollin, R. Pastorek, Z. Sindelar. Chemicke tabulky anorganickych sloucenin (Chemical tables of inorganic compounds). SNTL, 1986.

}}

Rubidium perchlorate, RbClO4, is the perchlorate of rubidium. It is an oxidizing agent, as are all perchlorates.

Preparation and properties

Rubidium perchlorate can be obtained through the careful heating of a rubidium chlorate solution, leading to a disproportionation reaction with the release of oxygen gas:{{Cite book|last=Abegg|first=R.|url=https://archive.org/stream/handbuchderanor09koppgoog#page/n451/mode/2up|title=Handbuch der anorganischen Chemie|last2=Auerbach|first2=F.|publisher=S. Hirzel|year=1908|volume=2|pages=431}}

:2 RbClO3 → RbClO4 + RbCl + O2

When heated, it decomposes into the chloride and oxygen:{{Cite book|last=d' Ans|first=Jean|title=Taschenbuch für Chemiker und Physiker. 3. Elemente, anorganische Verbindungen und Materialien, Minerale.|last2=Lax|first2=Ellen|publisher=Springer|year=1997|isbn=3-540-60035-3|edition=4th|volume=3|location=Berlin|pages=686|oclc=312750698}}

:RbClO4 → RbCl + 2 O2

It has two polymorphs. Below 279 °C, it crystallizes in orthorhombic crystal system with lattice constants a = 0.927 nm, b = 0.581 nm, c = 0.753 nm. Over 279 °C, it has a cubic structure with lattice constant a = 0.770 nm.

Table of solubility in water:

class="wikitable"

! Temperature (°C)

| 0

| 8.5

| 14

| 20

| 25

| 50

| 70

| 99

Solubility (g / 100 ml)

| 1.09

| 0.59

| 0.767

| 0.999

| 1.30

| 3.442

| 6.72

| 17.39

References