Achievement objective MW 7-2

Indicators

• Justifies the ions present in precipitation reactions using formulae and equations.
• Explains the nature and properties of molecular, ionic, metallic, and covalent network solids in terms of the forces between the particles in the substance.
• Draws Lewis structures for simple molecules and uses these to predict the shape and polarity of molecules.
• Relates the properties of a substance to its bonding and structure.
• Recognises the role of energy in a chemical reaction.
• Classifies organic substances according to their structure and the functional group of their molecules.
• Uses models to explain structural and geometric isomerism of organic molecules.
• Relates rate of reaction to the behaviour of the particles involved.
• Interprets data and explains the effect of changes made to systems at equilibrium and the significance of the equilibrium constant Kc.
• Describes the nature of species present in acidic and basic solutions in terms of proton transfer and represents this using balanced equations.
• Links the species present in a solution to the properties of the solution (for example, conductivity, rate of reaction, and pH).
• Recognises electron transfer in oxidation and reduction reactions and represents this using balanced equations.

Possible context elaborations

• Reactions of organic families: compare and contrast.
• Chemistry in the marketplace: Are all vinegars equal? How much aspirin is in a tablet? What are the most economical conditions for the manufacture of industrial chemicals (for example, urea, ammonia, sulfuric acid, superphosphate) in New Zealand?
• Which organic chemical is which? Identifying unknowns using the physical and chemical properties of organic compounds.
• Polyunsaturated vs saturated spreads; the trans fatty acid debate.
• Are diamonds forever?
• What’s the use of (for example) diamond, graphite, copper, silicon dioxide?
• Which ions are the oxidants?
• Conversion of chemical energy in fuels to heat energy.
• Conversion of fats and carbohydrates during metabolism.

Assessment for qualifications

At the time of publication, achievement standards were in development to align them with The New Zealand Curriculum. Please ensure that you are using the correct version of the standards by going to the NZQA website.

The NZQA subject-specific resources pages are very helpful. From there, you can find all the achievement standards and links to assessment resources, both internal and external.

Learn more with NZQA subject resources for:

• Chemistry

Aligned level 1 achievement standards were registered for use in 2011 and level 2 for use in 2012; level 3 will be registered for use in 2013.

Last updated September 15, 2020

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