Chemistry - Redox Reactions Question with Solution | TestHub
ChemistryRedox ReactionsTitrationMedium2 minQB
ChemistryMediumnumerical
A certain mass of anhydrous oxalic acid is converted into H₂O, CO₂ and CO, on heating in the presence of H₂SO₄. The CO formed reacts completely with iodine pentoxide to liberate iodine. The iodine thus liberated required 200 ml of 0.2 N thiosulphate. The mass (in g) of oxalic acid taken was
Answer:
9.00
Solution:
H₂C₂O₄ H₂O + CO₂ + CO (1 mol CO per mol acid); 5CO + I₂O₅ 5CO₂ + I₂ (5 mol CO per mol I₂). Thiosulphate: 0.200 × 0.2 = 0.04 eq, so I₂ = 0.02 mol and CO = 5 × 0.02 = 0.1 mol = mol acid. Mass = 0.1 × 90 = 9 g. Ans: 9.
Stream:JEESubject:ChemistryTopic:Redox ReactionsSubtopic:Titration
⏱ 2mℹ️ Source: QB
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