oxalic acid +ch3oh in the presence of conc.h2so4 gives?
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At first you need to know what happens when the first 2 products are heated, only then you can know what gasses pass trough the NaOH solution.
And that is: The weak and hydrated oxalic acid gets dehydrated& decomposed:
(COOH)2. 2H2O + conc. H2SO4 + heat→ CO(gas) + CO2(gas) + [H2SO4.3H2O]
then these gasses pass trough the NaOH solution:
Co pass-trough since it is not absorbed or reacting with the hydroxide,
but CO2 gets absorbed & reacts & becomes
Na2CO3
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