2. Practical Investigation (2000 words) Refer to NSW BOSTES Science Stage 6 Revised Support Document, ‘Open-ended investigations’ (pp.35-43), and to the NSW BOSTES Chemistry Stage 6 Syllabus, ‘Module 8.4: Water’ (pp.33-37); and particularly to Section 4: The concentration of salts in water will vary according to their solubility, and precipitation can occur when the ions of an insoluble salt are in solution together. In this section, students learn to “perform a first-hand investigation to make solutions to specified volume-to-volume and mass-to-volume specifications and dilute them to specified concentrations (cV = constant).” (a) Refer to the module content that should be covered during this investigation, i.e. Students learn to and Students columns and prepare a handout for students that provides an example of one way they could undertake this practical investigation. The handout should cover the following areas: The problem to be investigated; The design of the investigation that allows valid and reliable data and information to be collected; Identify the most appropriate equipment needed to undertake the investigation; Conducting the investigation (provide details of where and the time involved and how the data will be collected and recorded); How the data will be processed; How the results of the investigation will be communicated; and How the findings and investigation plan could be evaluated.
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