Chemistry - Stoichiometry Question with Solution | TestHub
ChemistryStoichiometryProblems Based on Mixtures, Percentage PurityMedium2 minQB
ChemistryMediumsingle choice
Passage / Comprehension
Chile saltpeter, a source of NaNO₃, also contains NaIO₃. The NaIO₃ can be used as a source of iodine, produced in the following reactions: IO₃⁻ + 3HSO₃⁻ I⁻ + 3H⁺ + 3SO₄²⁻ and 5I⁻ + IO₃⁻ + 6H⁺ 3I₂ + 3H₂O. One litre of Chile saltpeter solution containing 5.94 g NaIO₃ is treated with stoichiometric quantity of NaHSO₃. Now an additional amount of same solution is added to the reaction mixture to bring about the second reaction. (I = 127)
How many grams of I₂ can be produced per litre of Chile saltpeter?
Options:
Answer:
A
Solution:
From each litre (0.03 mol IO₃⁻), step I gives 0.03 mol I⁻, and step II converts it (with the extra 0.006 mol IO₃⁻) to I₂: 0.03 × 3/5 = 0.018 mol I₂. Mass = 0.018 × 254 = 4.572 g, matching (a).
Stream:JEESubject:ChemistryTopic:StoichiometrySubtopic:Problems Based on Mixtures, Percentage Purity
⏱ 2mℹ️ Source: QB
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