Question

0.05g of metal when treated with dil HCl gave 51mL of hydrogen at 27°C and 780mm Hg pressure. Calculate the equivalent mass of the metal. (equivalent weight of hydrogen= 1.008)
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Answer 1

Answer:

Volume of H

2

at STP =24.62×

300

273

=22.40 mL

22400 mL of H

2

at STP =1mole =2 Eq. of H

2

22.4 mL of H

2

=

22400

2

×22.4 =0.002 Eq of H

2

=0.002 Eq of metal

∴

EW

Weight

=0.002

0.002

0.05

=EW=25