Question

Example 4:0.45g of a metal gave 176.6 c.c. of hydrogen at 23°C and 740mm pressure when treated with dilute H.SO, Calculate the equivalent weight of the metal. Aqueous tension 20-21mm​

Answer 1

Answer:

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Answer 2

Answer:

Solution:- (A) 114.72g.

Given that specific heat of metal =0.057calg

−1

According to Dulong Petit law,

Approximate atomic weight=

specific heat

6.4

=

0.057

6.4

=112.28g

Equivalent weight of metal =38.24g(Given)

Now applying-

valency=

Equivalent weight

Approximate atomic weight

=

38.24

112.28

=2.93≈3

∴Exact atomic weight=valency×Equivalent weight

⇒Exact atomic weight=3×38.24=114.72g

Hence the exact atomic weight of metal is 114.72g.