Question

molecular weight of KMnO4 is M.in a reaction KMnO4 is reduced to K2MnO4.the equivalent weight of KMnO4 is​

Answer 1

Answer:

Explanation:

The equivalent mass of a substance is the ratio of molecular mass to the number of electrons gained (or lost) or change in the oxidation state. That is,

equivalent mass = molecular mass/number of electrons gained or lost or

= molecular mass/change in oxidation state

Here, potassium permanganate changes to potassium manganate. The relevant chemical reaction is:

MnO_4^(-) + e^(-) -> MnO_4^(2-)

Only 1 electron is gained by permanganate ion to convert to manganate ion. We can also see that the oxidation state of manganese is +7 in permanaganate ion and it changes to +6 in manganate ion. That is, the oxidation state changes by 1.

Thus, the equivalent mass = molecular mass/1 = molecular mass = M

Hence, the equivalent mass of KMnO4 is M when it converts over to K2MnO4.

Answer 2

Answer:

The correct answer of this question is  the equivalent mass = molecular mass/1 = molecular mass = M

Explanation:

Given -  Molecular weight of KMnO4 is M.in a reaction KMnO4 is reduced to K2MnO4.

To Find - Write the equivalent weight of KMnO4 is​.

The ratio of molecular mass to the number of electrons acquired (or lost) or the change in oxidation state determines a substance's equivalent mass. That is, equivalent mass equals molecular mass multiplied by the number of electrons gained or lost, or equivalent mass equals molecular mass multiplied by the change in oxidation state.

Potassium permanganate is converted to potassium manganate at this point. The chemical reaction in question is:

MnO_4^(-) + e^(-) -> MnO_4^(2-)

Permanganate ion gains only one electron when it converts to manganate ion. We can also see that manganese has a +7 oxidation state in permanaganate ion and a +6 oxidation state in manganate ion. In other words, the oxidation state shifts by one.

Hence, the equivalent mass of KMnO4 is M when it converts over to K2MnO4.

#SPJ2