Qualification > Sciences
Chemistry Help HERE ONLY !!
nid404:
--- Quote from: thukon on May 30, 2009, 01:12:54 pm ---
--- Quote from: AN10 on May 30, 2009, 01:08:25 pm ---why the melting point of alkali metals decreases down the group but of the halogens it increases down the group??
--- End quote ---
Yeah lilwaynes right. Its one of those unexplainable things youd probably only learn why in college.
@nid. What do sodium and ethanol form when reacted? And sodium and ethanoic acid?
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with ethanol u get sodium ethoxide (CH3CH2ONa but we don't have alkoxides in our syllabus)and hydrogen is liberated
sodium ethanoate and hydrogen with ethanoic acid
thukon:
OMG ALKOXIDE?? IM GONNA DIE NOW. but whatever as long as its not in our syllabus. I figured out the sodium ethanoate while waiting for a response, but what about the other 3? U said it reacts with A B C and D.
AFK for real now bye.
crypsAnity:
Okay,, I am sort of confused .. umm.. do we have to know about the Faraday Constant and all for Chemistry? as in ..in calculations in electolysis ..
because I sort of just checked the syllabus.. couldnt find anything in it .. but its in my book .. n well its a cambridge one =S ..and though i know there are loadsa stuff in it which aint in the syllabus but i our teacher still tells us to study stuff to be on the safe side.. but i honestly dont have time to study all tht.. so pleaseee anyone tell me if they are iN!
nid404:
--- Quote from: thukon on May 30, 2009, 01:26:13 pm ---OMG ALKOXIDE?? IM GONNA DIE NOW. but whatever as long as its not in our syllabus. I figured out the sodium ethanoate while waiting for a response, but what about the other 3? U said it reacts with A B C and D.
AFK for real now bye.
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with ethanoic acid
ethanol forms ethyl ethanoate
calcium carbonate forms calium ethanoate, carbon dioxide and water
copper oxide forms copper ethanoate and water
my speed's too slow....sorry for the delay
nid404:
--- Quote from: crypsanity on May 30, 2009, 01:40:46 pm ---Okay,, I am sort of confused .. umm.. do we have to know about the Faraday Constant and all for Chemistry? as in ..in calculations in electolysis ..
because I sort of just checked the syllabus.. couldnt find anything in it .. but its in my book .. n well its a cambridge one =S ..and though i know there are loadsa stuff in it which aint in the syllabus but i our teacher still tells us to study stuff to be on the safe side.. but i honestly dont have time to study all tht.. so pleaseee anyone tell me if they are iN!
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not for chem but for physics.......so chill 8)
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