A student investigates solubility rules by mixing aqueous ionic solutions at room temperature. They use clean test tubes and mix equal volumes (10.0 mL + 10.0 mL) of the following solutions:
A white solid forms immediately and the mixture becomes cloudy. The student then filters the mixture, rinses the solid with a small amount of distilled water, and collects the filtrate.
The student repeats the investigation but replaces Solution B with 0.10 mol L\(^{-1}\) sodium hydrogen carbonate, NaHCO\(_3\)(aq). In this second trial, the mixture becomes only slightly cloudy.
Assume all solutions are dilute, and that nitrate salts and sodium salts are soluble in water.
Write the balanced net ionic equation for the reaction responsible for the white precipitate in the first trial (Mg(NO\(_3\))\(_2\)(aq) mixed with Na\(_2\)CO\(_3\)(aq)). Include state symbols.
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Create Free Account Log inThis is a free HSC HSC Chemistry practice question worth 2 marks, testing your understanding of Conduct an investigation. It falls under Solution Equilibria in Module 5: Module 5: Equilibrium and Acid Reactions. Submit your answer above to receive instant AI-powered marking and personalised feedback.
Chemical systems may be open or closed. They include physical changes and chemical reactions that can result in observable changes to a system. Students study the effects of changes in temperature, concentration of chemicals and pressure on equilibrium systems, and consider that these can be predicted by applying Le Chatelier’s principle. Students also analyse the quantitative relationship between products and reactants in equilibrium reactions to determine an equilibrium constant. From this calculation, they predict the equilibrium position, either favouring the formation of products or reactants in a chemical reaction. This module also allows students to understand that scientific knowledge enables scientists to offer valid explanations and make reliable predictions. Students make reliable predictions by comparing equilibrium calculations and equilibrium constants to determine whether a combination of two solutions will result in the formation of a precipitate.
Inquiry question: How does solubility relate to chemical equilibrium?
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)
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