Variable Oxidation States

Question 1

Colour and Oxidation State of VO2 +

Answer 1

Yellow

+5

Question 2

Colour and Oxidation State of VO 2+

Answer 2

Blue

+4

Question 3

Colour and Oxidation State of V 3+

Answer 3

Green

+3

Question 4

Colour and Oxidation State of V 2+

Answer 4

Violet

+2

Question 5

Describe reduction of vanadium (V) ions

Answer 5

Reduced by adding them to zinc metal in an acidic solution

Question 6

Redox Potential of an Ion or Atom

Answer 6

Tells you how easily it is reduced to a lower oxidation state

Question 7

What are redox potentials the same as?

Answer 7

Electrode Potentials

Question 8

The Larger the Redox Potential?

Answer 8

The less stable the ion will be, so the more likely it is to be reduced

Question 9

Why will the redox potential of an ion not always be the same as its standard electrode potential?

Answer 9

Because it can vary depending on the environment that the ion is in

Question 10

Effect of ligands on redox potentials and describe

Answer 10

Standard electrode potentials are measured in aquoeus solution.

So any aqueous ions will be surrounded by water ligands.

Different ligands may make the redox potential larger or smaller depending on how well they bind to the metal ion in a particular oxidation state

Question 11

Effect of pH on redox potentials

General Rule

Answer 11

For some reactions, the pH of the solution affects the size of the redox potential.

Redox potentials will be larger in more acidic solutions, making the ion more easily reduced