Inorganic Reactions

Question 1

Colour of Vanadium different oxidising states?

Answer 1

Yellow, Blue, Green and Violet

Question 2

MnO4 + 5Fe²⁺ + 8H⁺ (colour)

Answer 2

Mn²⁺ + 5Fe³⁺ + 4H₂O (colourless -> pink)

Question 3

Cr 6+ used as a catalyst has an orange colour when oxidised what colour is Cr3+?

Answer 3

Green

Question 4

What is a Homogeneous catalyst?

Answer 4

Are in the same phase as the reaction species. Change in oxidation states

Question 5

What is an example of homogenous catalyst?

Answer 5

S₂O₈²⁻ + 2Fe²⁺ → 2SO₄²⁻ + 2Fe³⁺
2Fe³⁺ + 2I⁻ → 2Fe²⁺ + I₂
S₂O₈²⁻ + 2I⁻ → 2SO₄²⁻ + I₂

Question 6

What is a Heterogeneous catalyst?

Answer 6

are in two different phases to the reaction species.

Question 7

How does a heterozygous catalyst work?

Answer 7

Adsorb one or more reactants on the surface. Partially filled d orbital that accepts electrons causing weak bonds with the reactant. The bonds between adsorbed reactant and the catalyst break and new bonds form to make a product

Question 8

How does heterozygous catalyst slow down?

Answer 8

Catalyst can become blocked by impurities, when forming strong bonds catalysts becomes poisoned.

Question 9

What is the cataylst used in the Haber process?

Answer 9

Iron Catalyst

Question 10

What is the catalyst used for making methanol?

Answer 10

Chromium (III) oxide Cr2O3

Question 11

What is an autocatalysis?

Answer 11

When one of the products of a reaction acts as a catalyst for the reaction.

Question 12

2MnO₄⁻ + 16H⁺ + 5C₂O₄²

Answer 12

→ 2Mn²⁺ + 10CO₂ + 8H₂O
Mn2+ acts as a catalyst