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For the estimation of potassium permangnate using standard ferrous ammonium sulphate solution: (i) Write the chemical equation for the reaction involved. (ii) Write the equivalent mass of potassium permanganate. (iii) Name the indicator used. (iv) Mention the colour change at the end point. |
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Answer» SOLUTION :(i)`K_2Cr_2O_7 + 4H_2SO_4 to K_2SO_4 + Cr_2(SO_4)_(3) + 4H_2O xx 32` OR `K_2Cr_2O_7 + 6FeSO_4 + 7H_2SO_4 to K_2SO_4 + Cr_2(SO_4)_(3) + 3Fe_(2)(SO_4)_(3) + 7H_2O` (ii)392 (III) DIPHENYLAMINE (iv) Green to violet. |
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