Chemistry - Redox Reactions Question with Solution | TestHub
ChemistryRedox ReactionsProblem involving Equivalent ConceptMedium2 minQB
ChemistryMediumnumerical
A quantity of 1.245 g of CuSO₄· xH₂O was dissolved in water and H₂S was passed into it till CuS was completely precipitated. The H₂SO₄ produced in the filtrate required 10 ml of M - NaOH solution. Calculate x.
Answer:
5.00
Solution:
CuSO₄ + H₂S CuS + H₂SO₄; each mole of salt gives 1 mol H₂SO₄, needing 2 mol NaOH. NaOH = 0.010 × 1 = 0.01 mol, so H₂SO₄ = salt = 0.005 mol. Molar mass = 1.245/0.005 = 249 = 160 + 18x ⇒ x = 89/18 ≈ 5. Ans: 5.
Stream:JEESubject:ChemistryTopic:Redox ReactionsSubtopic:Problem involving Equivalent Concept
⏱ 2mℹ️ Source: QB
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