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Chemistry Help HERE ONLY !!

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frenzy1234:
dunno if this is the right place but anywas ...
ive done past papers from 2003-2008 for chem pp3
and i dnt have any more papers nor are any papers avalible online cn sm1 help me on how i shld practise now??

asus:
can anyone here help me with the oxidant and reductant...??..
like in ppr3 june 06...question 6 ( c )...

godfather93:
the reductant is zinc and the oxidant is hydrogen

asus:

--- Quote from: godfather93 on May 24, 2009, 08:20:05 pm ---the reductant is zinc and the oxidant is hydrogen

--- End quote ---

thanks..but could u explain it?..
 :)

godfather93:
first of all the definitions of reductant and oxidant are
reductant - causes the other element to be reduced. when this happens the reductant is oxidised (loses electrons)
oxidant - cause the other element to be oxidised. when this happens the oxidant is reduced (gains electrons)

zinc is the reductant because it is being oxidised. the metal is being transformed into ions and electrons are given out (hence the zinc rod becomes thinner)
hydrogen is the oxidant because the hydrogen ions in the electrolyte is being changed into hydrogen gas(hydrogen is being reduced)

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