Question 1
A seawater sample collected off Victor Harbor has a hydrogen ion concentration of 6.31 × 10⁻⁹ mol L⁻¹ at 25 °C. What is its pH?
SACE Chemistry practice questions by topic
Original questions for every topic, with worked explanations and feedback on written answers.
| Four-option questions | Worked or timed |
|---|---|
| Written questions | Calculations and explanations in parts, on a scenario |
| Written answers | Read against the mark points, with your next step |
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Question 2
A student adds marble chips to dilute hydrochloric acid in a conical flask at 22 °C and collects the carbon dioxide in a gas syringe. The graph shows the volume collected. What is the mean rate of production of carbon dioxide over the first 20 s?
Question 3
A flavour chemist in Adelaide records the formula CH₃CH₂COOCH₃ for a fruity-smelling liquid. Which functional group does this compound contain?
Question 4
At a treatment plant on the River Murray, aluminium sulfate is added to muddy water and the mixture is stirred gently. What does the aluminium sulfate do?
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Are past papers still useful?
Yes, for timing and question style. Check that a question's content is in the current subject outline before you rely on it.