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Question

When 4.215 g of metalic carbonate was heated in a hard glass tube, the CO2 evolved was found to be measured 1336 mL at 27oC and 700 mm pressure. If X g is the equivalent weight of the metal, then find the value of 1000X.

A
12188
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B
12000
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C
12500
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D
none of the above
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Solution

The correct option is B 12188
PV=nRT=WMwRT
700760×13361000=W44×0.0821×300
or, W=2.198gCO2
The molecular mass of any metal carbonate is 2E+60, where E is the equivalent mass of the metal.
So, 2E+604.215=442.198
or, E=12.188g

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