Q.

Aluminium reacts with sulfuric acid to form aluminium sulfate and hydrogen. What is the volume of hydrogen gas in liters (L) produced at 300 K and 1.0 atm pressure, when 5.4 g of aluminium and 50.0 mL of 5.0 M sulfuric acid are combined for the reaction? (nearest integer)

(Use molar mass of aluminium as 27.0 g mol1, R=0.08 atm L mol1K1

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answer is 6.

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Detailed Solution

2Al+3H2SO4Al2SO43+3H2
Moles of Al takes =5.427=0.2
Moles of H2SO4 taken =50×501000=0.25
As  0.22>0.253,H2SO4 is limiting reagent
Now, moles of H2 formed 1=33×0.25=0.25
Volume of H2 gas formed 1=nRTP=0.25×0.082×3001=6L
 

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