Chapter 20, Problem 41QRT

(a)

Interpretation Introduction

Interpretation:

Oxidation state of chromium in ${\text{FeCr}}_{\text{2}}{\text{O}}_{\text{4}}$ has to be given.

(b)

Interpretation Introduction

Interpretation:

Oxidation state of chromium in ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{5}}$ has to be given.

(c)

Interpretation Introduction

Interpretation:

Oxidation state of chromium in ${\text{K}}_{\text{2}}{\text{[CrF}}_{\text{6}}\text{]}$ has to be given.

(d)

Interpretation Introduction

Interpretation:

Oxidation state of chromium in ${\text{[Cr(en)}}_{\text{3}}{\text{]Cl}}_{\text{2}}$ has to be given.