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A colourless solution of a sodium salt is acidified… | StemPy Lab

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A colourless solution of a sodium salt is acidified with dilute hydrochloric acid. A pale yellow turbidity forms, and a gas with a choking smell comes off that decolourises acidified permanganate. What is the salt?

ChemistryAdvancedHigh School (11–12)The p-Block Elements

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A colourless solution of a sodium salt is acidified with dilute hydrochloric acid. A pale yellow turbidity forms, and a gas with a choking smell comes off that decolourises acidified permanganate. What is the salt?

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← A sample of 0.441 g of potassium dichromate, 294 g/mol, is dissolved in acid with an excess of potassium iodide. The iodine that forms is titrated with 0.144 mol/L sodium thiosulphate. The reactions are Cr₂O₇²⁻ + 6I⁻ + 14H⁺ → 2Cr³⁺ + 3I₂ + 7H₂O and I₂ + 2S₂O₃²⁻ → 2I⁻ + S₄O₆²⁻. What volume of thiosulphate is needed?Next →

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