Which of these gases can be dried with concentrated H2SO4...
Which of these gases can be dried with concentrated H2SO4?
HBr
H2S
NH3
SO2
Correct answer is D
In the preparation of SO2, we have the resultant reaction from heating the mixture of Na2SO3 and HCl as:
Na2SO3(aq)+2HCl(aq)→2NaCl(aq)+H2O(l)+SO2(g)
Passing the gas evolved through conc. H2SO4, we collect SO2 by DOWNWARD DELIVERY, leaving NaCl in the flask.
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