MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent ConceptPrevious Year Questions

1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is (JCECE 2008)

A.1.52

B.0.995

C.190

D.9✓ Correct

Explanation

Given, Weight of metal hydroxide = 1.520 g Weight of metal oxide = 0.995 g The equivalent weight of metal is defined as the equivalent amount of metal that combines with 8 grams of oxygen or 35.5 grams of chlorine or 1.008 hydrogen or 17 grams of hydroxide Let, the equivalent mass of metal = x 2 Weight of metal hydroxide eq mass of metal+eq mass of OH Weight of metal oxide eq mass of metal+eq mass of O 1.520 17 0.996 8 1.520 12.16 0.996 16.932 1.520 0.996 16.932 12.16 0.524 4.772 4.772 9.106870229 0.524 x x x x x x x x 53 MOLE & EQUIVALENT CONCEPT Therefore, the e

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