Curriculum

VCE Chemistry Units 1 and 2 - 8 Practice Pack

Getting Started - VCE CHEM U12 - 8 Practice Packs

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Year 11 Guide - VCE CHEM U12 - 8 Practice Packs

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Unit 1 Content: How Can the Diversity of Materials Be Explained?

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Unit 2 Content: What Makes Water Such a Unique Chemical?

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Exam Technique - VCE Chemistry Units 1 and 2 - 8 Practice Pack

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Advanced Depth - VCE Chemistry Units 1 and 2 - 8 Practice Pack

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Examiner Intelligence - VCE Chemistry Units 1 and 2 - 8 Practice Pack

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Practice Exam 1 of 8 - VCE CHEM U12

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Practice Exam 2 of 8 - VCE CHEM U12

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Practice Exam 3 of 8 - VCE CHEM U12

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Practice Exam 4 of 8 - VCE CHEM U12

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Practice Exam 5 of 8 - VCE CHEM U12

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Practice Exam 6 of 8 - VCE CHEM U12

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Practice Exam 7 of 8 - VCE CHEM U12

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Practice Exam 8 of 8 - VCE CHEM U12

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After the Exam - VCE CHEM U12 - 8 Practice Packs

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Text lesson

VCE-CHEM-U12 7.1 📋 Practice Exam 4: Question Paper

Practice Exam 4

VCE Chemistry | Solutions, Electrolytes, Gases, Introductory Acids & Bases

✎ Complete ALL questions on paper before opening the Model Answers lesson. No notes. Aim for 1 minute per mark.

SHORT ANSWER

Question 1 (4 marks)

Explain, using the Brønsted-Lowry theory, what happens when HCl dissolves in water. Identify the conjugate acid-base pairs.

✎ Write your answer on paper

Question 2 (4 marks)

A gas sample at 27°C and 200 kPa occupies 5.0 L. Calculate the volume at 127°C and 100 kPa.

✎ Write your answer on paper

Question 3 (4 marks)

Calculate the pH of: (i) 0.050 mol/L HNO₃ (ii) 0.050 mol/L NaOH

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Question 4 (4 marks)

Describe what happens at the molecular level when NaCl dissolves in water. Include a diagram description.

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Question 5 (4 marks)

A container holds N₂ at 80 kPa and O₂ at 20 kPa. What is the total pressure? If the volume is then halved (constant T), what is the new partial pressure of each gas?

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Question 6 (4 marks)

Explain why HF is a weak acid despite F being the most electronegative element. Compare to HCl.

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Question 7 (4 marks)

Describe three colligative properties of solutions and explain what they all have in common.

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Question 8 (4 marks)

Calculate the mass of KOH (M=56) needed to neutralise 250 mL of 0.400 mol/L H₂SO₄.
2KOH + H₂SO₄ → K₂SO₄ + 2H₂O

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EXTENDED RESPONSE

Extended Response 1: Acid-Base Chemistry

Question 9 (4 marks)

Extended Response 1: Acid-Base Chemistry (a)
A student titrates 20.00 mL of an unknown H₂SO₄ solution with 0.0500 mol/L NaOH. Three titre readings are: 21.30, 21.25, 21.20 mL.
Calculate the average titre and the concentration of H₂SO₄.
(H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O)

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Extended Response 1: Acid-Base Chemistry

Question 10 (2 marks)

Extended Response 1: Acid-Base Chemistry (b)
Would phenolphthalein or methyl orange be a more appropriate indicator for this titration? Justify your answer.

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Extended Response 1: Acid-Base Chemistry

Question 11 (2 marks)

Extended Response 1: Acid-Base Chemistry (c)
Explain why a weak acid/weak base titration is difficult to perform accurately.

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Extended Response 2: Ideal Gas Law

Question 12 (4 marks)

Extended Response 2: Ideal Gas Law (a)
A 2.50 g sample of dry ice (CO₂, M=44) sublimes completely in a 500 mL rigid container at 25°C. Calculate the pressure in kPa. (R=8.314 J/mol/K)

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Extended Response 2: Ideal Gas Law

Question 13 (3 marks)

Extended Response 2: Ideal Gas Law (b)
Explain two ways in which real gases deviate from ideal gas behaviour.

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✓ Finished? Open the next lesson – Model Answers – to mark your work.