M5 EAR REV

IQ1 What happens when chemical reactions do not go through to completion?

1.1 Investigating reversible reactions.

1.2 Static and dynamic equilibrium; open and closed systems.

1.3 Entropy and enthalpy in non-equilibrium systems.

1.4 Collision theory and reaction rate in equilibrium reactions.

IQ2 What factors affect equilibrium and how?

2.1 Factors that affect equilibrium and Le Châtelier.

2.2 Equilibrium observations and collision theory.

2.3 Activation energy, heat of reaction and equilibrium position.

IQ3 How can the position of equilibrium be described and what does the equilibrium constant represent?

3.1 The equilibrium expression and constant Keq.

3.2 Calculating Keq.

3.3 Temperature and Keq.

3.4 Investigating Keq.

3.5 Keq and dissociation reactions.

IQ4 How does solubility relate to chemical equilibrium?

4.1 Dissolution of ionic compounds in water.

4.2 Using solubility to remove food toxins.

4.3 Investigating solubility rules.

4.4 Ksp and solubility.

4.5 Formation of precipitates and Ksp.

MODULE 5 REVIEW

PAST HSC QUESTIONS

Le Chatelier's Principle

2016 28a (2); 28b (3)

2015 Q16

2009 Q23 (6)

2006 Q23bii (2)

Factors which can affect the equilibrium in a reversible reaction

2017 Q16; 18

2016 Q14; 28a (2); 28b (3)

2015 Q16

2013 Q10; 24a (2); 24b (2); 25 (4)

2012 Q16; 23 (3)

2011 Q13; 30 (6)

2010 Q18

2009 Q23 (6)

2008 Q7; 23 (4)

2006 Q23bii (2)

2005 Q7; 27bi (2); 27bii (2)

2004 Q10

Do not need to know this specifically, it is an example of equilibrium, but has been used in past HSC questions: describe the solubility of carbon dioxide in water under various conditions as an equilibrium process and explain in terms of Le Chatelier's principle

2017 Q16; 26b (4)

2014 Q30b (4)

2012 Q23 (3)

2011 Q13

2009 Q2

2005 Q7

Haber Process also useful in Module 8 iQ3: describe that the synthesis of ammonia occurs as a reversible reaction that will reach equilibrium

2017 Q30 (7)

2015 Q30 (6)

2014 Q13

2006 Q24a (1)

2005 Q27a (1); 27bi (2); 27bii (2)

Haber Process also useful in Module 8 iQ3: identify the reaction of hydrogen with nitrogen as exothermic

2017 Q30 (7)

2015 Q30 (6)

2008 Q23 (4)

Haber Process also useful in Module 8 IQ3: explain why the rate of reaction is increased by higher temperatures; explain why the yield of product in the Haber process is reduced at higher temperatures using Le Chatelier; explain why the Haber process is based on a delicate balancing act involving reaction energy, reaction rate and equilibrium; explain that the use of a catalyst will lower the reaction temperature required and identify the catalyst(s) used in the Haber process

2017 Q30 (7)

2015 Q30 (6)

2014 Q20; 27a (2)

2012 Q3

2011 Q30 (6)

2008 Q23 (4)

2007 Q13

2006 Q12

2005 Q27bi (2); 27bii (2)

analyse the impact of increased pressure on the system involved in the Haber process

2017 Q18; 30 (7)

2015 Q30 (6)

2014 Q13; 20

2013 Q24a (2)

2007 Q13

2005 Q27bi (2); 27bii (2)

explain why monitoring of the reaction vessel used in the Haber process is crucial and discuss the monitoring required

2015 Q30 (6)