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What happens when ethyne is treated with...

What happens when ethyne is treated with water in the presence of `H_2SO_4` and `HgSO_4` at 333-348K?

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Ethanal is formed as a product, when ethyne is treated with water in the presence of `H_2SO_4` and `HgSO_4` at 333-348 K.
`underset("Ethyne")(HC -= HC)+H_2O overset("333-348 K")underset(H_2SO_4//HgSO_4)to underset("Ethenol (unstable)")(CH_2=CHOH) overset("Rearrangement")(harr) underset("Ethanal")(CH_3-overset(O)overset(||)C-H)`
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