Name: Reaction Between Ferrous Ion and Potassium Dichromate
Uploaded: 2019-07-19
Duration: 4 min 21 s
Description: This video explains the excellent oxidising agent, potassium dichromate. One mole of potassium dichromate can oxidise six moles of ferrous sulphate molecules...

Question

Manganese has been described as 'the most versatile element'. Explain this and show the similarities and differences between the chemistry of manganese and rhenium.

Accepted Answer

Manganese exhibits a variable oxidation state due to more number of valence electrons and shows more reactive when compared to the neighbouring elements.

It shows the widest range of oxidation states from $- III to + VII$ of all the elements.

Due to is vast oxidations, it is considered as more versatile elements

Differences between the chemistry of manganese and rhenium.

Properties $Mn$ $Re$

Stable oxidation state $+ 2$ $+ 3 and + 7$

$+ 7$ oxidation state Strong oxidizing agent Weak oxidizing agent

$+ 2$ oxidation state Most stable
Uncommon and strongly reducing

$N_{2}$ ${Mn}_{3} N_{2} (at 1200 ° C)$ No reaction

$C$ ${Mn}_{3} C$ No reaction

$H_{2} O$ Release $H_{2}$ No reaction

Dilute acids ${Mn}^{+ 2}$ release $H_{2}$ No reaction

Strong acids ${Mn}^{+ 2}$ release $H_{2}$ Slow reaction

Similarities.

$Mn$ show a similar reactivity with sulphides and oxygen to give $MnS, {Mn}_{3} O_{4} and {ReS}_{2}, {Re}_{2} O_{7}$ .

${Mn}^{+ 1} and {Re}^{+ 1}$ act as strong reducing agent.

Manganese has been described as 'the most versatile element'. Explain this and show the similarities and differences between the chemistry of manganese and rhenium.

Important Questions on Group 7 - the Manganese Group

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