Author Topic: helpful chemistry remarks?  (Read 1271 times)

Offline omar abbassy

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helpful chemistry remarks?
« on: June 11, 2009, 12:27:23 pm »
i think most ppl know them but just in case:
*all nitrates are soluble
*all chlorides are soulble except silver chloride and lead chloride
*all sulphates are soluble except barium sulphate and lead slphate
*all hydroxides and carbonates are INSOLUBLE except sodium,potassium and ammonium salts
*all oxides are INSOLUBLE except sodium potassium and calcium
*impure water has a lower melting point and higher boiling point
*ionic compounds are more soluble than covalent
*distillation=evaporation then condensation
*calcium carbonate reacts with acid rain= co2
*cuso4.5h20+heat=dehydration+endothermic,colour change from blue to white
*when a metal nitrate is heated with aqueous sodium hydroxide then heated ammonia produced
*copper reacts with CONCENTRATED sulphuric acid to give so2
hope i helped

Offline ButterFlyEffect

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Re: helpful chemistry remarks?
« Reply #1 on: June 11, 2009, 01:10:28 pm »
Thanq XD

Q80BOY

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Re: helpful chemistry remarks?
« Reply #2 on: June 11, 2009, 01:13:57 pm »
great help omar !!

+REP

keep it up  ;)

Offline esso

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Re: helpful chemistry remarks?
« Reply #3 on: June 11, 2009, 01:29:22 pm »
nice help...
keep it up...
good wrk=+rep
Thanks,,

Offline esso

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Re: helpful chemistry remarks?
« Reply #4 on: June 11, 2009, 02:59:23 pm »
add one calcium sulphate is insoluble....