Debrief -> Science Chemistry!
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Rb react with steam = i donno what will happen... lol...Originally posted by Darkness_hacker99:Take it as cold water, unless it specify steam.
2Rb(s) + 2H2O(l) --> 2RbOH(aq) + H2(g) -
Explosion! Explosion! and Explosion!! Boom!~Originally posted by Hocklez:Rb react with steam = i donno what will happen... lol...
Rb(s) + H2O(g) --> RbO(s) + H2(g) -
yeah extremely negative enthalpy...+ hig hsurface area and energy of steamOriginally posted by Hocklez:Rb react with steam = i donno what will happen... lol...
anyway, post qns you guys dont know and i will try to answer, got an A for chem promotional exam (
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I! think i fail liao. ):
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):Originally posted by LordIcarus:I! think i fail liao. ):
Don't worry! Do ya best at MCQ!
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good lucks to all taking geog today
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my friend told me chem paper was mostly testing your concept...what does she meant by concepts???
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It means using your brain juice instead of memorising & throwOriginally posted by felirox:my friend told me chem paper was mostly testing your concept...what does she meant by concepts???
(a.k.a do ten yr-memorise text book ) -
then will other sci subjects like phy or bio likely to test your concept?Originally posted by Coffee Gabriel:It means using your brain juice instead of memorising & throw (a.k.a do ten yr-memorise text book ) -
Not so sure..Cause now I pinning hopes on my phyOriginally posted by felirox:then will other sci subjects like phy or bio likely to test your concept?
Stupid chem..screwed me! 
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phy is understanding...lols
chem is memorising.
but some parts of phy is oso memorising if you do not understand. -
jia lat lar... i think i'll get around 45/65 for Chem paper... Can get A2 after moderation a not for Chemistry? T.T
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Rb2O is very highly unlikely to be produced that way. Rubidium oxide reacts immediately on contact with water.Originally posted by Darkness_hacker99:Explosion! Explosion! and Explosion!! Boom!~
Rb(s) + H2O(g) --> RbO(s) + H2(g)
2Ru(s) + 2H2O(g) --> 2RuOH(aq) + H2(g) -
Yar. You are right.Originally posted by ultranova3:Rb2O is very highly unlikely to be produced that way. Rubidium oxide reacts immediately on contact with water.
2Ru(s) + 2H2O(g) --> 2RuOH(aq) + H2(g)
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Where's Rb oxide?Originally posted by Darkness_hacker99:Yar. You are right. -
Wah, this thread reminds me of when I was still studyin.
and now I realise I dun even use this knowledge in real life applications -
I realised it, but can we do anything? No...Originally posted by Pion:Wah, this thread reminds me of when I was still studyin.
and now I realise I dun even use this knowledge in real life applications -
yay i same as u .. zz i write rubidium reacts explosively with water and it can casue an explosion within seconds... cus i saw 1 video in utube.. gt 1 guy put small amount of rb into a tub of water den hor.. the whole tub exploded.. the whole tub is gone.. lolsOriginally posted by ultranova3:Rb2O is very highly unlikely to be produced that way. Rubidium oxide reacts immediately on contact with water.
2Ru(s) + 2H2O(g) --> 2RuOH(aq) + H2(g) -
Brainiac Alkali Metals VideoOriginally posted by metalcar:yay i same as u .. zz i write rubidium reacts explosively with water and it can casue an explosion within seconds... cus i saw 1 video in utube.. gt 1 guy put small amount of rb into a tub of water den hor.. the whole tub exploded.. the whole tub is gone.. lols
http://www.youtube.com/watch?v=m55kgyApYrY -
Abit too vague . My teacher tell me , must say " Hydrogen Chloride dissolves in water and gains hydrogen ions from the water to give Hydrochloric Acid. "Originally posted by Darkness_hacker99:Hydrogen Chloride dissolves in water to gives Hydrochloric acid. -
ya darkie.. tats the video i've watched .. lools =.=Originally posted by Darkness_hacker99: -
double post.