POTASSIUM BROMIDE

Name: Yuki NgClass: 3AClass Number: 30

CONTENT Basic Information (Name, Formula, Electron Diagram) Physical Properties Chemical Properties Others (Uses, Potential hazards, special

characteristics) Reference

POTASSIUM BROMIDE

Formula: KBrElectron Diagram: + -

K Br

PHYSICAL PROPERTIES melting point: 734 °C (1007 K) boiling point: 1435 °C (1708 K) physical state at room temperature: solid colour: white solubility in water: 53.5 g/100 ml (0 °C) density: 2.75 g/cm3

electrical conductivity: electrolyte it conducts electricity only in molten and aqueous states, but not solid

CHEMICAL PROPERTIES laboratory preparation: A traditional method for the manufacture of KBr is the reaction of potassium carbonate with a bromide of iron, Fe3Br8, made by treating scrap iron under water with excess Br2: 4 K2CO3 + Fe3Br8 → 8 KBr + Fe3O4

+ 4 CO2

An reducing agent Reactivity: 1) Is not in generally strong reactive. 2) Incompatible with oxidizing agents 3) Violent reactions occur with bromine trifluoride.

OTHERS Uses: 1) Veterinary -treat epilepsy(癲癇 )in animals 2) Medical -sedative(鎮靜劑 ) -an antiepileptic drug 3) For optical windows and prisms 4) photographic emulsion (感光乳劑 ) 5) lithography (平版印刷術 ) 6) water clarification Potential hazards: Oxides of the contained metal and

halogen.

OTHERS Interesting or special characteristics 1) In a dilute aqueous solution, potassium bromide

tastes sweet, at higher concentration it tastes bitter, and when most concentrated it tastes salty to humans.

2) In high concentration potassium bromide -May cause eye and skin irritation -Strongly irritates the gastric mucous

membrane, leading to nausea and sometimes vomiting.

3) Potassium bromide should be given with food.

REFERENCE Wikipedia Answers.com (http://www.answers.com/topic/potassium-bromide)http://www.chemicalland21.com/industrialchem/inorganic/POTASSIUM%20BROMIDE.htmJt-baker

(http://www.jtbaker.com/msds/englishhtml/p5587.htm)Optics Lands

(http://www.sciner.com/Opticsland/KBr.htm)http://www.marvistavet.com/html/potassium_bromide.htmlhttp://www.canine-seizures.freeservers.com/potassium_bromide.htm

THE END Thank

you