Silver Bromide

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Identification
Molecular formula: 

AgBr

State
State: 

solid

Melting point (Celsius): 
432.00
Melting point (Kelvin): 
705.15
General information
Appearence: 

pale yellow solid

Molar mass: 
187.7700g/mol
Density: 
6.4730g/cm3

Although the compound can be found in mineral form, AgBr is typically prepared by the reaction of silver nitrate with an alkali bromide, typically potassium bromide:[1]

    AgNO3(aq) + KBr(aq) → AgBr(s)+ KNO3(aq)

Although less convenient, the salt can also be prepared directly from its elements.

Modern preparation of a simple, light-sensitive surface involves forming an emulsion of silver halide crystals in a gelatine, which is then coated on a film or other support. The crystals are formed by precipitation in a controlled environment to produce small, uniform crystals (typically < 1 μm in diameter and containing ~1012 Ag atoms) called grains