When is the oxidation state of metal indicated in the name of a compound

When the metal can exist in more than one oxidation state

Explanation:

When metal exhibit more than one oxidation sate, we have to write the oxidation number of the metal in front of it to for a better clarity. Most of the transition metals exhibit more than one oxidation state due to presence of d electrons. For example the oxidation state of iron are "+2 and +3"

The oxidation state of copper are "+1 and +2"

The oxidation state of Mn are :"+2", +4, +7. so we generally write there oxidation state in roman For Mn compound in +2 oxidation state we write Mn(II) For Mn compound in +7 oxidation state we write Mn(VII)

hey there!

boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

hope this you

tobey

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