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IG Chemistry Paper 3 discussion

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LoCo93:

--- Quote from: VIP_93 on June 02, 2009, 06:47:01 am ---for the bond energies they were H----H and F----F and 2H----F
we add the bond energies for H----H and F----F
then we multiply 2 by H----F
then we subtract (H----H + F----F)- (2*H---F)
the ans will be negative


--- End quote ---

wohoo i did the same thng.. got a -530 :S.. or sumthn..

zara:

--- Quote from: LoCo93 on June 02, 2009, 01:25:27 pm ---
--- Quote from: zara on June 02, 2009, 12:35:20 pm ---the two blanks abt the acrylic acid??
well the answer was lactic acid and water

--- End quote ---

urgh thank god umm not the onli one who rote that.. <3..

By the way what did u guys ryte for the question abt making sure its an acid.. ??

--- End quote ---
i rote react it with a base.....salt and water will form....though im nt sure if its rite or rong...

LoCo93:
i rote sumthin like add a magneisum (or any metal) ribbon and if its acidic it'll react..  ??? ??? ::) dont kno tho..

LoCo93:
i rote silicon was the limitin reagent but ppl keep sayin it was fluorin..

i rote silicon cus it was in shotest supply :S..

Ukhti-R:
yeah loco.. I rote silion too... itt had the least amount of moles...

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