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The drain cleaner , Drainex contains sma...

The drain cleaner , Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at `20^@C` and one bar will be released when 0.15 g of aluminium reacts?

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The chemical reaction taking place is `2Al+2NaOH+2H_2Oto2NaAlO_2+3H_2`
`2mol` `3mol`
`2times27g` `3mol`
54 g of Al produces hydrogen =3 mol
0.15 g of Al produces hydrogen
`=(3times0.15)/54mol=8.33times10^-3mol`.
Calculate of volume of `8.33 times 10^-3` mol of hydrogen at `20^@` and 1 bar.
`V=(nRT)/p`
`(8.33times10^-3mol times0.083 ba r Lk^-1mol^-1times293k)/(1 b a r)`
= 0.20282 L (or) 202.82 mL
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