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ALL CIE CHEMISTRY DOUBTS HERE !!

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TJ-56:

--- Quote from: EMO123 on April 18, 2011, 02:29:26 pm ---3(b)(i)

CO2 + 2NaOH ? Na2CO3 + H2O

SnO2 + 2NaOH ? Na2SnO3 + H2O



--- End quote ---

Thanx.
Regarding the third reaction though, SiO2, silicon (iv) dioxide, on the markscheme gives a similar reaction to that of SnO2, but I have read that SiO2 and NaOH dont react. So i dont know if the book is incorrect or the mark scheme. Do they react?

elemis:

--- Quote from: TJ-56 on April 18, 2011, 03:45:18 pm ---Thanx.
Regarding the third reaction though, SiO2, silicon (iv) dioxide, on the markscheme gives a similar reaction to that of SnO2, but I have read that SiO2 and NaOH dont react. So i dont know if the book is incorrect or the mark scheme. Do they react?

--- End quote ---

It does react. You would get Na2SiO3 and water

TJ-56:

--- Quote from: Ari Ben Canaan on April 18, 2011, 04:21:43 pm ---It does react. You would get Na2SiO3 and water



--- End quote ---

oh ok thanx

EMO123:

--- Quote from: TJ-56 on April 18, 2011, 05:41:36 pm ---oh ok thanx

--- End quote ---
by mistake i wrote it Na2SnO3
it is written right by ari

thecandydoll:
A few of the organic questions in A2 Paper 4 are in the form of skeletal forumla.How do you do it?

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