AS 91388 annotated exemplars

This annotated exemplar is intended for teacher use only. Annotated exemplars are extracts of student evidence, with commentary, that explain key parts of a standard. These help teachers make assessment judgements at the grade boundaries.

Download all exemplars and commentary [PDF, 244 KB]

TKI Chemistry assessment resources (external link)

For Excellence, the student needs to demonstrate understanding of spectroscopic data in chemistry.

This involves producing evidence that shows the integration of IR, C-13 NMR and mass spectra to justify the structure of an unknown molecule.

The student needs to produce evidence of integrating the links between the key aspects of the three spectra to the correct structure of the unknown molecule.

This student has explained the links between the key peaks on the three spectra to the structure of the unknown molecule (1).

The student has provided evidence of integrating the information from the three spectra to rule out some the possible structures (2) and to the justify the correct structure (3).

For Excellence, the student needs to demonstrate comprehensive understanding of spectroscopic data in chemistry.

This involves justifying the structure of organic molecules by integrating spectroscopic data.

This student has integrated the three types of spectroscopic data to justify the identification of the unknown molecule (1).

For a more secure Excellence, the student could explain how other molecules were excluded based upon the information from the spectroscopic data supplied.

For Merit, the student needs to demonstrate in-depth understanding of spectroscopic data in chemistry.

This involves determining the structure of organic molecules using spectroscopic data.

This student has explained how the three types of spectroscopic data were used to identify the molecule (1).

To reach Excellence, the student could intergrate more of the identified data to justify the identification of the molecule.

For Merit, the student needs to demonstrate in-depth understanding of spectroscopic data in chemistry.

This involves determining the structure of organic molecules using spectroscopic data.

This student has identified a possible structure using some of the identified data from two types of spectroscopic data (1).

For a more secure Merit, the student could explain how the identified data supports the identification of the molecule.

For Achieved, the student needs to demonstrate understanding of spectroscopic data in chemistry.

This involves identifying discrete aspects of the structure of organic molecules using teacher-provided spectroscopic data.

This student has identified discrete aspects of the spectroscopic data (1) and has used some of the spectroscopic data to identify a possible structure (2).

To reach Merit, the student could explain how two different types of spectroscopic data result in the identification of the molecules structure.

For Achieved, the student needs to demonstrate understanding of spectroscopic data in chemistry.

This involves identifying discrete aspects of the structure of organic molecules using teacher-provided spectroscopic data.

This student has identified discrete aspects from all three types of spectroscopic data (1).

For a more secure Achieved, the student could identify what functional group that relates to the peaks on the infrared (IR) graph.

For Achieved, the student needs to demonstrate understanding of spectroscopic data in chemistry.

This involves identifying discrete aspects of the structure of organic molecules using teacher-provided spectroscopic data.

This student has identified some discrete aspects of two spectroscopic techniques (1).

To reach Achieved, the student could identify the main peaks on the infrared (IR) graph, use the mass spectroscopy data to identify the molecular formula and use the NMR to identify the number of unique carbon environments.