ATSI Cycads

IQ4: How does solubility relate to chemical equilibrium?

Students:

● investigate the use of solubility equilibria by Aboriginal and Torres Strait Islander Peoples when removing toxicity from foods, for example:

– toxins in cycad fruit

● conduct an investigation to determine solubility rules, and predict and analyse the composition of substances when two ionic solutions are mixed, for example:

– potassium chloride and silver nitrate

– potassium iodide and lead nitrate

– sodium sulfate and barium nitrate (ACSCH065)

● derive equilibrium expressions for saturated solutions in terms of Ksp and calculate the solubility of an ionic substance from its Ksp value

● predict the formation of a precipitate given the standard reference values for Ksp