Catalyst Reactions

Question 1

What is the overall reaction for the Contact Process?

Answer 1

SO₂ + 1/2O₂ => SO₃

Question 2

What are the two reactions that make up the Contact Process?

Answer 2

V₂O₅ + SO₂ => V₂O₄ + SO₃

V₂O₄ + 1/2O₂ => V₂O₅

Question 3

What is the overall reaction between iodide ions and peroxodisulphate ions?

Answer 3

S₂O₈²⁻ + 2I⁻ => I₂ + 2SO₄²⁻

Question 4

What are the two reactions that make up the reaction between iodide ions and peroxodisulphate ions?

Answer 4

S₂O₈²⁻ + 2Fe²⁺ => 2Fe³⁺ + 2SO₄²⁻

2Fe³⁺ + 2I⁻ => I₂ + 2Fe²⁺

Question 5

What is the overall reaction for the autocatalysis reaction between MnO₄⁻ and C₂O₄²⁻?

Answer 5

2MnO₄⁻ + 16H⁺ + 5C₂O₄²⁻ => 2Mn²⁺ + 8H₂O + 10CO₂

Question 6

What are the two reactions that make up the reaction between MnO₄⁻ and C₂O₄²⁻?

Answer 6

4Mn²⁺ + MnO₄⁻ + 8H⁺ => 5Mn³⁺ + 4H₂O

2Mn³⁺ + C₂O₄²⁻ => 2Mn²⁺ + 2CO₂

Question 7

What is the half equation at the positive electrode for a lithium cell?

Answer 7

Li⁺ + CoO₂ + e⁻ —-> Li⁺[CoO₂]⁻

Question 8

What is the equation for the negative electrode in a lithium cell?

Answer 8

Li —-> Li⁺ + e⁻

Question 9

What is the half equation for the negative electrode in an alkaline hydrogen fuel cell?

Answer 9

H₂ + 2OH⁻ —-> 2H₂O + 2e⁻

Question 10

What is the half equation for the positive electrode in an alkaline hydrogen fuel cell?

Answer 10

O₂ + 2H₂O + 4e⁻ —-> 4OH⁻

Question 11

What are the two reactions that make up the ‘Iodine Clock’?

Answer 11

H₂O₂ + 2I⁻ + 2H⁺ => 2H₂O + I₂

2S₂O₃²⁻ + I₂ => 2I⁻ + S₄O₆²⁻