Chapter 16, Problem 50E

Interpretation Introduction

Interpretation:

The oxidation state of chromium in each given compound is to be determined.

Concept information:

The oxidation state of a substance is defined as the transfer of electrons in a chemical compound. It can either be zero, positive or negative. An atom which gains electron has a negative value of oxidation state and atom which loses has a positive oxidation state.

The oxidation state of an atom in Free State is zero.

The oxidation state of a monatomic ion is equal to the charge on the ion.

In the compounds, the overall oxidation state of a neutral atom is zero.

Each group possess a particular oxidation state. The oxidation state of group I is $+1$, group II is $+2$, group 5A is $-3$, group 6A is $-2$ and group 7A is $-1$.