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brittni8924
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If a 2.893 g sample of an unknown containing iron requires 28.45 mL of the permanganate solution described in Pre-Laboratory question 3 to reach the endpoint what is the % Fe in the unknown?
brittni8924 said:If a 2.893 g sample of an unknown containing iron requires 28.45 mL of the permanganate solution described in Pre-Laboratory question 3 to reach the endpoint what is the % Fe in the unknown?
Borek said:I suppose the missing information was listed in the question 3.
Still, reaction equation is a starting point.
The purpose of determining iron by redox titration is to accurately measure the amount of iron present in a sample. This can be useful in various industries, such as food and pharmaceuticals, to ensure the quality and safety of products.
The principle behind redox titration for iron determination is based on the reaction between iron ions and a titrant, typically a solution of potassium permanganate. Iron ions are oxidized by the permanganate ions, and the endpoint of the reaction is detected using an indicator.
The concentration of iron can be calculated using the titration results by using the following formula: (volume of titrant x molarity of titrant x number of iron ions per molecule) / volume of sample. The number of iron ions per molecule is determined by the balanced chemical equation of the redox reaction.
One limitation of using redox titration for iron determination is that it requires a relatively large sample size, which may not be practical in certain situations. Additionally, the accuracy of the results can be affected by the purity of the sample and the presence of other substances that can interfere with the redox reaction.
The accuracy of redox titration for iron determination can be improved by carefully controlling the experimental conditions, such as using a pure sample and properly calibrating the titrant solution. It is also important to perform multiple trials and calculate the average to reduce errors. Alternatively, other methods such as atomic absorption spectroscopy can be used for more precise and accurate results.