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Reaction taking place in Drainex(a drain...

Reaction taking place in Drainex(a drain cleaner), when it is mixed with water is: `2Al + 2NaOH + 2H_(2) rarr 2 NaAlO_2 +3H_2`
What volume(in ml) of dihydrogen at `20^@C` and 1 bar will be released, if drainex contains 0.15 g of aluminium?

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Verified by Experts

The correct Answer is:
203
`2Al + 2NaOH +2H_2O rarr2NaAlO_2`
`2 xx 27g`
0.15 g
`+3 H_2`
3 mol
`= (0.15 xx3)/(2xx27) = 0.00833 ` mol
`pV = nRT`
`V_(H_2) = (0.00833 "mol" xx0.0821 dm^3 "atm K"^(-7) "mol"^(-1)xx293 K )/(1xx0.987 "atm")`
(1 bar = 0.987 atm)
`VH_2 = 0.203 "dm"^3`
`VH_2 = 203 mL`
Note: Temperature must be in kelvin. If it is given in `""^@C` , convert it into K.
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