The two functions performed by the concentrated sulfuric acid in the reaction is that Concentrated sulphuric acid often removes molecules of water from formic acid and it acts as a dehydrating agent in creation of carbon monoxide.
The function of the concentrated sulfuric acid in a reaction is that Concentrated sulfuric acid can be used as a catalyst.
It help to Speeds up the reaction and can also be a dehydrating agent, by bringing in the equilibrium to the right and leading to a greater yield of ester.
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