Redox Titration: How to Determine Fe (aq)2+ Concentration

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    Redox Titration
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Redox titration is a method used to determine the concentration of a specific ion, such as Fe2+, by reacting it with a standard solution that has a known concentration. The key to a successful titration is selecting a reactant that can effectively oxidize Fe2+ to Fe3+. In this case, H2O2 is identified as the suitable oxidizing agent. The process involves monitoring the reaction until the stoichiometric point is reached, where the amount of titrant added is equivalent to the amount of the analyte present. Understanding the stoichiometry of the reaction is crucial for accurate determination.
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To determine the concentration of Fe (aq)2+ by a redox titration, we could use an acidified
standard solution of

A. Sn2+
B. Pb2+
C. HCl
D. H2O2

I know the answers H2O2, but i don't know how to get it. How doe redox titrations work?
 
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Redox titration works as every other kind of titration. You need to select reaction with well known stoichiometry and react substance that you want to determine with substance of know concentration, somehow detecting the moment when amount of the substance added was stoichiometric.

http://www.titrations.info/

http://www.titrations.info/potentiometric-titration

In this particular case you need to select substance that is able to react with Fe2+, oxidizing it to Fe3+. Not much choice.

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