From Engineering Chemistry



Name the ores of iron.


What is Mohr's salt?


Name the external indicator used in determination of ferrous content.




What will happen if K 3[Fe(CN) 6] is used as an internal indicator in this titration?


Write the chemical reactions involved in this reaction.


Why is K 2Cr 2O 7 used as an oxidizing agent only in the presence of acid?


Why is H 2SO 4 added for preparing a standard solution of Mohr's salt?


Why does K 2Cr 2O 7 not act as a self-indicator?


Name one external and one internal indicator used in K 2Cr 2O 7 titration.


Which is a more powerful oxidizing agent, KMnO 4 or K 2Cr 2O 7?


What is the equivalent weight of K 2Cr 2O 7?


Which substance can be used as a self-indicator?


Name one adsorption indicator.


Give the equivalent weight of an oxidizing agent.


What is the oxidation state of Cr in K 2Cr 2O 7?


Why should the K 3[Fe(CN) 6] indicator be freshly prepared?


Give the formula of Mohr's salt.


What is the deep blue colored compound formed in the experiment?



Haematite (Fe 2O

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