QCE ChemistryPractice Examination 4

This paper covers

• Volumetric analysis: back-titration determination of ethanoic acid in commercial vinegar (n=cV, dilution scaling, excess-reagent logic)
• Acid-base equilibrium: Bronsted-Lowry conjugate pairs, weak-acid pH, Ka/pKa, Kw and pOH
• Titration-curve interpretation: half-equivalence (pH = pKa), equivalence-point pH for weak acid + strong base, indicator selection
• Buffer action of the ethanoate/ethanoic acid system
• Chemical equilibrium: Kc expressions and calculations, ICE tables, Le Chatelier and collision theory
• Oxidation and reduction: oxidation states, half-equations, galvanic cells, E°cell, spontaneity and electrolysis
• Organic structure: the carboxylic-acid and ester functional groups, IUPAC naming, isomerism, intermolecular forces
• Organic synthesis: esterification, oxidation of alcohols, addition (Markovnikov), multi-step pathways
• Industrial chemistry and green chemistry: atom economy, percentage yield, limiting reagent, renewable feedstocks
• QCAA cognitions AO1–AO4 with Band A evidence-directed reasoning, full worked solutions and marking guides

Students are permitted to bring into the examination the materials normally allowed for this subject. Answer all questions in the spaces provided.

This is an ATARMAxxing practice paper. It is not an official examination and is not affiliated with, endorsed by, or produced by the VCAA, NESA or the QCAA.