Magnesium bromate

Magnesium bromate IUPAC name Magnesium bromate Other names Magnesium bromate(V) Identifiers InChI InChI=1/2BrHO3.Mg/c2*2-1(3)4;/h2*(H,2,3,4);/q;;+2/p-2 InChIKey RNUHOKZSYYKPPI-NUQVWONBAV Standard InChI InChI=1S/2BrHO3.Mg/c2*2-1(3)4;/h2*(H,2,3,4);/q;;+2/p-2 Standard InChIKey RNUHOKZSYYKPPI-UHFFFAOYSA-L CAS number [14519-17-6] EC number 238-530-1 ChemSpider 55642 Properties Chemical formula Mg(BrO3)2 Molar mass 280.11 g mol−1 Appearance white solid Related compounds Other anions Magnesium chlorate Magnesium iodate Other cations Calcium bromate Strontium bromate Barium bromate Other compounds Magnesium bromide Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Magnesium bromate hexahydrate IUPAC name Magnesium bromate — water (1/6) Identifiers InChI InChI=1/2BrHO3.Mg.6H2O/c2*2-1(3)4;;;;;;;/h2*(H,2,3,4);;6*1H2/q;;+2;;;;;;/p-2 InChIKey CMVOJSWILFNLFI-NUQVWONBAE Standard InChI InChI=1S/2BrHO3.Mg.6H2O/c2*2-1(3)4;;;;;;;/h2*(H,2,3,4);;6*1H2/q;;+2;;;;;;/p-2 Standard InChIKey CMVOJSWILFNLFI-UHFFFAOYSA-L CAS number [7789-36-8] EC number 238-530-1 ChemSpider 175115 Properties Chemical formula Mg(BrO3)2·6H2O Molar mass 388.20 g mol−1 Appearance white crystalline solid Density 2.29 g cm−3 Melting point 200 °C dehydr. Solubility in water 42 g/100 g (18 °C) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Magnesium bromate, Mg(BrO₃)₂, is the magnesium salt of bromic acid.

Preparation

Magnesium bromate is usually prepared by the electrolysis of magnesium bromide solution at 65–70 °C, in the presence of dichromate and using anodes of lead dioxide or iron and cathodes of stainless steel or copper. The magnesium bromate can be crystallized by cooling the electrolyte, and any unoxidized bromide recycled.

Magnesium bromate can also be prepared by reacting bromine with magnesium hydroxide at 50–90 °C.

3 Br₂ + 3 OH⁻ ⇌ BrO−3 + 5 Br⁻ + 3 H⁺