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19 Nov 2019
EXPERIMENT 8: ANALYSIS OF AN IRON (IT) SOLUTION BY REDOX TITRATION Materials Required: 50 mL buret with clamp and stand 0.020 M potassium permanganate solution-KMn04(a) unknown iron (II) sulfate solution- FeSO4 (ao) 1 M sulfuric acid solution 10 mL measuring pipet green pipette pump II (for measure pipet) Note: The potassium permanganate solution should be prepared and used in the same day (approximately 60 mL per Lab group). The solution should not be stored as decomposition over time will change the concentration. SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY. POTASSIUM PERMANGANATE IS A STRONG OXIDIZING AGENT AND CAN BE DAMAGING TO THE SKIN, EYES, AND CLOTHING. POTASSIUM PERMANGANTE WILL STAIN SKIN AND CLOTHING IF YOU SPILL ANY SOLUTION, IMMEDIATELY WASH WITH WATER NOTIFY YOUR INSTRUCTOR. PROCEED TO THE NEAREST SAFETY SHOWER IF NECESSARY. Background: In an acidic solution, permanganate rapidly oxidizes iron (II) to iron (III), while itself is reduced to manganese (II). The overall balanced chemical equation for this reaction is as follows: 5Fer(aq) + Mno.(aq) + 8H+ (aq) â 5Fe0aq) + Mn2+(aq) + 4H20() In this experiment you will use potassium permanganate, as the titrant in the analysis of an iron (II) sulfate solution of unknown concentration. 45
EXPERIMENT 8: ANALYSIS OF AN IRON (IT) SOLUTION BY REDOX TITRATION Materials Required: 50 mL buret with clamp and stand 0.020 M potassium permanganate solution-KMn04(a) unknown iron (II) sulfate solution- FeSO4 (ao) 1 M sulfuric acid solution 10 mL measuring pipet green pipette pump II (for measure pipet) Note: The potassium permanganate solution should be prepared and used in the same day (approximately 60 mL per Lab group). The solution should not be stored as decomposition over time will change the concentration. SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY. POTASSIUM PERMANGANATE IS A STRONG OXIDIZING AGENT AND CAN BE DAMAGING TO THE SKIN, EYES, AND CLOTHING. POTASSIUM PERMANGANTE WILL STAIN SKIN AND CLOTHING IF YOU SPILL ANY SOLUTION, IMMEDIATELY WASH WITH WATER NOTIFY YOUR INSTRUCTOR. PROCEED TO THE NEAREST SAFETY SHOWER IF NECESSARY. Background: In an acidic solution, permanganate rapidly oxidizes iron (II) to iron (III), while itself is reduced to manganese (II). The overall balanced chemical equation for this reaction is as follows: 5Fer(aq) + Mno.(aq) + 8H+ (aq) â 5Fe0aq) + Mn2+(aq) + 4H20() In this experiment you will use potassium permanganate, as the titrant in the analysis of an iron (II) sulfate solution of unknown concentration. 45
Irving HeathcoteLv2
3 Jul 2019