(5) A standard sclution of hydrated iron(II) sulphate, FeSO,.XH20, was preparcd by dissolving 5.8 g of thesalt in a volumetric flask and making it up to 250 mL (250 cm³). Twenty-five millilitres (25 mL (25 cm³)) ofthis solution was acidified and found to react exactly with, 22.8 cm³ (22.8 mL), of 0.018 M potassium3permanganate solution. The half-equations for the reaction are:JAS 00MACaJTTMNO4 (aq) + 8H*(aq)Fe*(aq)+ Mn2“(aq) + 4H20(1)→ Fe*(aq) + eMOTTAMIMAXE2+(i; What is the indicator for the titration of a solution of iron (II) sulphate and potassium permanganate soluticn?(ii) Indicate the colour at the end point if the permanganate is in the burette.bloodofieido rosd sl(iii) Why is it necessary to acidify the iron(II) solution before titration?o sd am eorsiuols

(i) Observing the given reaction shows that electrons are lost from iron. So in given titration…

(C) A standard sclution of hydratcd iron(11) sulphate, FeSO,.XH20, was preparcd by dissolving 5.8 g of the salt in a volumetric flask and making it up to 250 mL (250 cm³). Twenty-five millilitres (25 mL (25 cm³)) of this solution was acidified and found to react exactly with, 22.8 cm³ (22.8 mL), of 0.018 M potassium permanganate solution. The half-equations for the reaction are: MnO, (aq) + 8H*(aq) Fe"(aq)- + Mn²*(aq) + 4H2O(1) → Fe"(aq) + e YATIM (i) What is the indicator for the titration of a solution of iron (II) sulphate and potassium permanganate solution? berio (ii) Indicate the colour at the end point if the permanganate is in the burette. . (iii) Why is it necessary to acidify the iron(II) solution before titration?

(C) A standard sclution of hydratcd iron(11) sulphate, FeSO,.XH20, was preparcd by dissolving 5.8 g of the salt in a volumetric flask and making it up to 250 mL (250 cm³). Twenty-five millilitres (25 mL (25 cm³)) of this solution was acidified and found to react exactly with, 22.8 cm³ (22.8 mL), of 0.018 M potassium permanganate solution. The half-equations for the reaction are: MnO, (aq) + 8H(aq) Fe"(aq)- + Mn²(aq) + 4H2O(1) → Fe"(aq) + e YATIM (i) What is the indicator for the titration of a solution of iron (II) sulphate and potassium permanganate solution? berio (ii) Indicate the colour at the end point if the permanganate is in the burette. . (iii) Why is it necessary to acidify the iron(II) solution before titration?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.12QAP

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