20 Practice Questions for Year 11 Chemistry Module 3: Reactive Chemistry

Predicting Reactions of Metals

Inquiry Question 2: How is the reactivity of various metals predicted?

Question 6

Complete the table below and then rank the metals based on their reactivity: (8 marks)

L2.1:Conduct practical investigations to compare the reactivity of a variety of metals in: Water, Dilute acid, Oxygen, Other metal ions in solution

Question 7

Compare the similarities and differences between your results from your metal activity series practical from the theoretical metal activity series from secondary sources (2 marks). 

L2.2: construct a metal activity series using the data obtained from practical investigations and compare this series with that obtained from standard secondary-sourced information

Question 8

Label the ionization energy, atomic radius and electronegativity patterns in the periodic table below: (3 marks)

Image sourced from Science Notes

Question 9

Describe and explain the trends in metal activity on the periodic table in terms of their ionization energy, atomic radius and electronegativity. (6 marks)  

L2.3: analyse patterns in metal activity on the periodic table and explain why they correlate with, for example: ionisation energy, atomic radius,  electronegativity

Question 10

Identify which is the reductant in the following reaction (3 marks): 

a) CH4(g)  + O2 (g) → H2O(l) + CO2 (g)

b) Fe3O4(aq) + 4H2 (g) → 3Fe(aq) + 4H2O (l) 

c) 4Al(s) +3O2(g) → 2Al2O3(s) 

L2.4: apply the definitions of oxidation and reduction in terms of electron transfer and oxidation numbers to a range of reduction and oxidation (redox) reactions

Question 11

Describe how you would measure and compare the reduction potential of galvanic half-cells containing copper and zinc. Include diagrams if necessary. (6 marks) 

L2.5: conduct investigations to measure and compare the reduction potential of galvanic half-cells

Question 12

Write the half -equations and balanced overall redox equations for the reactions of the following metals:

a) Copper and iron 

b) Silver and lead 

c) Nickel and Magnesium 

L2.6: Construct relevant half-equations and balanced overall equations to represent a range of redox reactions

Question 13

Following from Question 11, calculate the cell potential for each of the metal pairs (3 marks) 

L2.6: Construct relevant half-equations and balanced overall equations to represent a range of redox reactions

Question 14

Identify the oxidant and reductant between the following metal pairs: (5 marks)

a) Magnesium and Barium 

b) Mercury and Iron 

c) Nickel and Silver 

d) Gold and Lead

e) Copper and Tin 

L2.7: predict the reaction of metals in solutions using the table of standard reduction potentials

Question 15

Explain how to predict whether a redox reaction is spontaneous or not using cell potentials (3 marks). 

L2.8: predict the spontaneity of redox reactions using the value of cell potentials (ACSCH079, ACSCH080

Rates of Reactions

Inquiry Question 3: What affects the rate of a chemical reaction?

Question 16

Explain how the following factors can influence the rate of reaction: (5 marks)

a) Increasing temperature on an endothermic reaction 

b) Decreasing temperature on an exothermic reaction 

c) Using a powdered reagent as opposed to a massive block of reagent

d) Increasing the concentration of reactant 

e) The addition of catalysts to an exothermic reaction 

L3.1: conduct a practical investigation, using appropriate tools (including digital technologies), to collect data, analyse and report on how the rate of a chemical reaction can be affected by a range of factors, including but not limited to: temperature, surface area of reactant(s), concentration of reactant(s), catalysts (ACSCH042)

Question 17

A student grounded a block of reagent to powder to influence its rate of reaction. Explain how using a powdered reagent is more preferable to using a massive block of reagent (3 marks).

Question 18

Explain the role of a catalyst in altering the rate of reaction. (3 marks)

L3.1 Conduct a practical investigation, using appropriate tools (including digital technologies), to collect data, analyse and report on how the rate of a chemical reaction can be affected by a range of factors, including but not limited to: temperature, surface area of reactant(s), concentration of reactant(s), catalysts (ACSCH042). 

Question 19

Explain how molecular orientation affects activation energy, with reference to the collision theory (4 marks). 

L3.2: investigate the role of activation energy, collisions and molecular orientation in collision theory

Question 20

With reference to the collision theory, explain how temperature changes can alter reaction rate (4 marks).

L3.2: explain a change in reaction rate using collision theory