Variable oxidation states

Question 1

Transition metals can exist in …

Answer 1

Variable oxidative states

Question 2

When you switch between oxidation states, its a…

Answer 2

redox reaction- the metal ions are either oxidised or reduced.

Question 3

For example, vanadium can exist in FOUR OXIDATION STATES IN SOLUTION - THE +2,+3, +4, +5

Answer 3

learn the table on page 56

Question 4

Vanadium (V) ions can be reduced by adding…

Answer 4

ZINC METAL in ACIDIC SOLUTION.

Question 5

Here are the equations for each of the reduction reactions.

Answer 5

learn equations on page 56

Question 6

The REDOX POTENTIAL of an ion or atoms tells you how easy it is…

Answer 6

REDUCED to a lower oxidation state.

Question 7

The LARGER the redox potential…

Answer 7

the less stable the ion will be, and so more likely the ion will be reduced

Question 8

For example, copper (II) has a redox potential of 0.15V, so it’s…

Answer 8

less stable and more likely to be reduced

Question 9

For example, copper (III) has a redox potential of -0.41V so it’s…

Answer 9

more stable and less likely to be reduced