2018 · Q24
The equivalent weight of Ba(OH) is (given, 2 atomic weight of Ba is 137.3)
General KnowledgeChemistry
- A85.7
- B137.3
- C154.3
- D171.3
Explanation
Barium hydroxide has the formula Ba(OH)2, with molecular mass 137.3 + 2*(16 + 1) = 171.3. Its equivalent weight is the molecular mass divided by the total valency (acidity) of 2, giving 171.3/2 = 85.65, approximately 85.7. The options 137.3, 154.3 and 171.3 do not result from this division. Hence the equivalent weight is 85.7.