Module 8: Applying Chemical Ideas
9 dot points across 3 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.
Inquiry Question 3: How, and why, are chemical reactions used to produce particular products?
Inquiry Question 1: How are the ions present in the environment identified and measured?
- Conduct investigations to use colourimetry, UV-visible spectrophotometry and atomic absorption spectroscopy (AAS) to measure the concentration of species in aqueous solution
A focused answer to the HSC Chemistry Module 8 dot point on instrumental concentration measurement. The Beer-Lambert law, building and using a calibration curve, when to choose colourimetry vs UV-vis vs AAS, how AAS uses a hollow-cathode lamp to reach part-per-billion detection of metals, and worked HSC past exam questions.
9 min answer → - Conduct investigations to measure the concentration of cations and anions in solution using gravimetric analysis and precipitation titrations
A focused answer to the HSC Chemistry Module 8 dot point on quantitative wet-chemistry analysis. The full gravimetric workflow (precipitate, filter, dry, weigh), worked sulfate-as-barium-sulfate calculation, the Mohr precipitation titration of chloride with silver nitrate, sources of error, and worked HSC past exam questions.
9 min answer → - Conduct qualitative investigations to test for the presence in aqueous solutions of cations and anions using flame tests, precipitation reactions and complexation reactions
A focused answer to the HSC Chemistry Module 8 dot point on qualitative ion identification. Flame tests for group 1 and 2 cations, precipitation tests for transition metals and halides, complexation tests for copper, iron and silver, a structured systematic analysis, and worked HSC past exam questions.
10 min answer → - Analyse the need for monitoring the environment
A focused answer to the HSC Chemistry Module 8 dot point on environmental monitoring. Why we measure cation and anion concentrations in air, water and soil, the legal and health thresholds involved, the difference between qualitative and quantitative analysis, and worked HSC past exam questions.
7 min answer →
Inquiry Question 2: How is information about the reactivity and structure of organic compounds obtained?
- Investigate the processes used to analyse the structure of simple organic compounds, including infrared spectroscopy
A focused answer to the HSC Chemistry Module 8 dot point on infrared spectroscopy. How bond vibrations absorb IR radiation, the diagnostic absorption ranges for O-H, N-H, C=O, C-H and C=C, how to read an IR spectrum to identify functional groups, the role of the fingerprint region, and worked HSC past exam questions.
8 min answer → - Investigate the processes used to analyse the structure of simple organic compounds, including mass spectroscopy
A focused answer to the HSC Chemistry Module 8 dot point on mass spectrometry. The five stages of a mass spectrometer (ionisation, acceleration, deflection, detection, recording), how to read a mass spectrum, identifying the molecular ion and the base peak, recognising fragment loss of 15, 17, 29, 45, the M+2 isotope pattern of chlorine and bromine, and worked HSC past exam questions.
9 min answer → - Investigate the processes used to analyse the structure of simple organic compounds, including proton and carbon-13 NMR
A focused answer to the HSC Chemistry Module 8 dot point on NMR spectroscopy. How spin-half nuclei resonate in a strong magnetic field, the four features of a proton NMR spectrum (number of signals, chemical shift, integration, multiplicity via the n+1 rule), carbon-13 chemical shift ranges, the role of TMS, and worked HSC past exam questions.
10 min answer → - Conduct qualitative investigations to test for the presence in organic molecules of carbon-carbon double bonds, hydroxyl groups and carboxylic acids
A focused answer to the HSC Chemistry Module 8 dot point on qualitative tests for organic functional groups. The bromine water and acidified permanganate tests for C=C, the sodium and acidified dichromate tests for hydroxyl, the sodium carbonate and reactive metal tests for carboxylic acids, a flowchart for an unknown, and worked HSC past exam questions.
8 min answer →