Question

The equivalent mass of K₂Cr₂O₇ in acidic medium is equal to ______.

Options

• molecular mass

• `1/2` × molecular mass

• `1/5` × molecular mass

• `1/6` × molecular mass

Answer 1

The equivalent mass of K₂Cr₂O₇ in acidic medium is equal to `bbunderline(1/6 xx "molecular mass")`.

Explanation:

In an acidic medium, potassium dichromate (K₂Cr₂O₇) gets reduced by gaining 6 electrons. Hence, its n-factor is 6.

The equivalent mass of a compound is calculated as:

Equivalent mass = `"Molecular mass"/"n-factor"`

= `"Molecular mass"/6`

= `1/6 xx "molecular mass"`