Question

What is the equivalent mass of $IO_4^ - $ when it is converted into ${I_2}$ in acidic medium?
A.$\dfrac{M}{6}$
B.$\dfrac{M}{7}$
C.$\dfrac{M}{8}$
D.$\dfrac{M}{4}$
E.None of these

Answer 1

Hint: We know Equivalent weight, in science, the amount of a substance that precisely responds with, or is equivalent to the joining worth of a subjectively fixed amount of another substance in a specific response. Substances respond with one another in stoichiometric, or artificially same, extents, and a typical standard has been embraced. The idea of comparable weight has been dislodged by that of molar mass, which is the mass of one mole of a substance.

Complete answer:
Equivalent weight is the mass of one substance that is the mass of a given substance which will consolidate with or uproot a fixed amount of another substance. The same load of a component is the mass that joins with or dislodges \[1.008\] grams of hydrogen or \[8.0\] grams of oxygen or \[35.5\] grams of chlorine. These qualities compare to the nuclear weight separated by the typical valence; for oxygen as model that is \[\dfrac{{16.0g}}{2} = 8.0g\] .
One can calculate the equivalent mass using the formula,
$Equivalent\;Mass = \dfrac{{Molar mass}}{{n - factor}}$
The change in oxidation number is the n factor of the substance.
Here, Change in oxidation number of,
$I = X\left( 4 \right)\left( { - 2} \right) = - 1$
$I = + 7$
Henceforth, n factor \[ = 7\]
Presently, Equivalent mass of
Presently, you can undoubtedly compute identical weight when given atomic mass of iodine and nuclear mass of Oxygen.
Consequently answer is equivalent Weight of

Hence, option D is correct.

Note:
We know that equivalent weight has the measurements and units of mass, in contrast to nuclear weight, which is dimensionless. Equivalent weight was initially controlled by test, yet (to the extent that they are as yet utilized) is currently gotten from molar masses. Also, the same load of a compound can be determined by isolating the atomic mass by the quantity of positive or negative electrical charges that outcome from the disintegration of the compound.