Permanganometric titration experiment solution [IOE,TU]

Permanganometric Titration 

Permanganometric titration involves the use of potassium permanganate (KMnO4) as a titrant to determine the concentration of an analyte present in a solution. This method is commonly used to determine the concentration of reducing agents such as iron, hydrogen peroxide, oxalic acid, and others.

Standardizing a solution of potassium permanganate (KMnO4) involves determining its exact concentration by titration against a solution of known concentration, often ferrous ammonium sulfate (Mohr's salt). This process helps establish the precise strength of the KMnO4 solution.

To estimate the amount of iron in Mohr's salt using the standardized KMnO4 solution, follow these steps:

Standardizing KMnO4 Solution:

1.Weighing Mohr's Salt:Weigh a precise amount of Mohr's salt (Fe(NH4)2(SO4)2·6H2O), dissolve it in water, and transfer it to a flask.

2.Titration:Titrate the Mohr's salt solution with the standardized KMnO4 solution until a color change occurs (from pink/purple of KMnO4 to colorless). Record the volume of KMnO4 solution used.

3.Calculation: Use the volume and known concentration of the standardized KMnO4 solution to calculate the concentration of the Mohr's salt solution.

Estimating Iron in Mohr's Salt:

1.Preparation: Dissolve a known amount of Mohr's salt in water to make a solution.

2.Titration:Titrate this solution with the standardized KMnO4 solution. The number of moles of KMnO4 consumed is equal to the number of moles of Fe2+ ions in Mohr's salt.

3.Calculation:Use stoichiometry to determine the amount of iron present based on the balanced chemical equation between Fe2+ and KMnO4.

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Make sure to handle chemicals carefully, accurately measure volumes, and follow proper lab protocols during these procedures. Also, perform necessary calculations with precision to obtain accurate results for both the standardization of KMnO4 and the determination of iron content in Mohr's salt.