Silver sulfate

Structural formula
General
Surname	Silver sulfate
Molecular formula	Ag 2 SO 4
Brief description	white rhombic crystals
External identifiers / databases
CAS number 10294-26-5 EC number 233-653-7 ECHA InfoCard 100.030.581 PubChem 159275 Wikidata Q411864
properties
Molar mass	311.79 g mol −1
Physical state	firmly
density	5.45 g cm −3
Melting point	655 ° C
boiling point	Decomposes at 1085 ° C
solubility	poor in water (8 g l −1 at 25 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 318-410 P: 273-280-305 + 351 + 338-313
Thermodynamic properties
ΔH f 0	−715.9 kJ / mol
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver sulfate is the silver salt of sulfuric acid in which silver is in the +1 oxidation state . The salt is used, among other things, to purify water (germicidal).

Silver sulfate is made by dissolving silver in hot concentrated sulfuric acid:

${\displaystyle \mathrm {2\ Ag\ +2\ H_{2}SO_{4}\longrightarrow \ Ag_{2}SO_{4}\ +\ SO_{2}+2\ H_{2}O} }$

or by metathesis of silver nitrate in an aqueous solution of an alkali metal sulfate:

${\displaystyle \mathrm {2\ AgNO_{3}\ +\ M_{2}SO_{4}\longrightarrow \ Ag_{2}SO_{4}\ +\ 2\ MNO_{3}} }$

M = alkali metal ion

this falls out, ${\displaystyle \mathrm {\ Ag_{2}SO_{4}} }$

Individual evidence

1. ↑ ^{a b c} Entry on silver sulfate. In: Römpp Online . Georg Thieme Verlag, accessed on December 28, 2014.
2. ↑ ^{a b c d e f} Entry on silver sulfate in the GESTIS material database of the IFA , accessed on January 10, 2017(JavaScript required) .
3. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-4.