MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryMole _ Equivalent ConceptApplications of Strength of Solutions
To neutralize completely 20 mL of 0.1 M aqueous solution of phosphorus (H₃PO₃) acid, the volume of 0.1 M aqueous KOH solution required is
A.60 mL
B.20 mL
C.40 mL✓ Correct
D.10 mL
Explanation
3 3 2 3 2 2 2 H PO KOH K HPO H O → By applying standard molarity equation we get, 1 1 3 3 2 2 1 2 ( ) ( ) M V H PO M V KOH n n 2 0.1 20 0.1 1 2 V x x 2 40 V ml . Equivalent Weight & Equivalent Concept
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