Year 11 Chemistry study notes and practice questions

For Year 11 and 12 students sitting the HSC, VCE, QCE, SACE, WACE and more. Each unit has short study notes, flashcards and practice questions, and the app builds timed practice exams from the whole course.

• Atomic structure and periodicityAtoms, isotopes and relative atomic mass; Electron configuration; Periodic trends; Emission spectra
• Bonding and intermolecular forcesIonic bonding; Covalent bonding, shape and polarity; Metallic and network structures; Intermolecular forces
• The mole and concentrationThe mole; Percentage composition and formulas; Concentration and dilution; Other concentration units
• Gas laws and stoichiometryGas laws; Ideal gas law and molar volume; Stoichiometry; Limiting reagents and yield
• Redox and galvanic cellsOxidation numbers; Redox reactions and half-equations; Activity series and displacement; Galvanic cells
• Reaction types and ratesReaction types and precipitation; Collision theory and energy profiles; Factors affecting rate; Measuring rates and Maxwell–Boltzmann
• Drivers of reactions: enthalpy, entropy and GibbsEnthalpy change; Calorimetry; Hess’s law and bond enthalpies; Entropy and Gibbs free energy
• Working scientifically in chemistryPlanning, safety and sources; Technique and errors; Significant figures and uncertainty; Analysing and evaluating data

4 multiple choice and 2 written questions. Try each one before you open the answer. Written answers show the model answer and what a full-marks response needs.

1. Question 1. Atomic structure and periodicityMultiple choice

   How many neutrons are in ⁵⁶Fe (Z = 26)?

   1. A26
   2. B56
   3. C30
   4. D82
   Show answer

   C. 30

2. Question 2. Bonding and intermolecular forcesMultiple choice

   The formula of calcium phosphate is…

   1. ACa(PO₄)₂
   2. BCa₃(PO₄)₂
   3. CCaPO₄
   4. DCa₂(PO₄)₃
   Show answer

   B. Ca₃(PO₄)₂

3. Question 3. Bonding and intermolecular forces: ionic bonding3 marks

   Explain why sodium chloride conducts electricity when molten but not when solid.

   Show model answer and marking criteria

   Model answer. Sodium chloride consists of a lattice of Na⁺ and Cl⁻ ions held by strong electrostatic attraction. In the solid, the ions are fixed in place and cannot move, and there are no free electrons, so it cannot conduct. When molten, the lattice breaks down and the ions are free to move, so they can carry charge through the liquid.

   A full-marks answer:

   • Sodium chloride is an ionic lattice of Na⁺ and Cl⁻ ions
   • In the solid the ions are held in fixed positions and cannot move
   • When molten the ions are free to move and carry charge
4. Question 4. The mole and concentrationMultiple choice

   Which is the best primary standard?

   1. AAnhydrous sodium carbonate
   2. BConcentrated HCl
   3. CSodium hydroxide
   4. DPotassium (metal)
   Show answer

   A. Anhydrous sodium carbonate

   NaOH absorbs water and CO₂ from the air.

5. Question 5. The mole and concentration: the mole3 marks

   Calculate the number of oxygen atoms in 5.00 g of calcium carbonate (CaCO₃, M = 100.09 g/mol).

   Show model answer and marking criteria

   Model answer. Moles of CaCO₃ = 5.00 ÷ 100.09 = 0.0500 mol. Each formula unit contains three oxygen atoms, so moles of O = 3 × 0.0500 = 0.150 mol. Number of oxygen atoms = 0.150 × 6.022 × 10^²^³ = 9.02 × 10^²^².

   A full-marks answer:

   • n(CaCO₃) = 5.00 ÷ 100.09 = 0.0500 mol
   • n(O) = 3 × 0.0500 = 0.150 mol
   • N(O) = 0.150 × 6.022 × 10^²^³ = 9.02 × 10^²^² atoms
6. Question 6. Gas laws and stoichiometryMultiple choice

   A gas at 100 kPa is compressed from 4.0 L to 2.0 L at constant T. The pressure becomes…

   1. A100 kPa
   2. B400 kPa
   3. C50 kPa
   4. D200 kPa
   Show answer

   D. 200 kPa

A few of the 133 Year 11 Chemistry flashcards. In the app they use spaced repetition: rate each card Again, Hard, Good or Easy and it comes back just before you would forget it.

• Atomic numberNumber of protons (Z).
• Ionic bondElectrostatic attraction between oppositely charged ions.
• Avogadro’s constant6.022 × 10^²^³ per mol
• Boyle’s lawP₁V₁ = P₂V₂ at constant temperature.

In calculations, write the balanced equation, show every conversion with units and keep sensible significant figures. Learn the reasons behind trends and shifts (why ionisation energy rises, why an equilibrium moves) rather than only the rule, because extended responses are marked on the explanation.

Press Study for me and the app builds a 15 to 20 minute session from the cards that are due, the mistakes that are due and questions on your weakest topics. Practice questions come in three levels, and anything you get wrong comes back 1, 3 and 7 days later until you get it right. When an exam is close, sit a timed practice exam with AI marking.

Your state, your exam

Chemistry goes by different names around Australia. In the app the course shows under your state’s name: NSW, VIC, QLD, SA, WA, TAS, ACT, NT: Chemistry.

When you set up Year 11, you pick your state (NSW, VIC, QLD, SA, WA, TAS, ACT or NT) and your subjects. The AI then pitches explanations and marking at your certificate’s level. Courses differ between states, so compare the units above with your course outline, and turn your class notes into extra decks for anything that’s different.

Chemistry in Year 12

Year 12 Chemistry study notes and practice questions.

More Year 11 courses

Year 11 Maths Advanced, Year 11 Maths Standard, Year 11 English, Year 11 Modern History, Year 11 Biology, Year 11 Business Studies, Year 11 Legal Studies, Year 11 PDHPE. All Year 11–12 subjects.