SOLUTIONS AND SOLUBILITY

SCH3UHolly Grandy

IntroductionSolutions are everywhere!

Listen to the Soluble Song!

Lesson SequenceIntroduction to Solutions - The Soluble Song (2

min)Think-Pair-Share –list examples of soluble &

insoluble substances and solutions(2 min) Concept Attainment– Where does it belong? (3 min)Demo – lava lamp in a bottle (2 min)Lab Safety Review (5 min)Lab Stations - Jigsaw Activity to explore

characteristics of solutions (30 min)Mind Map –(small groups) (10 min)Homework Activity

Think-Pair-ShareList examples of:

soluble substancesinsoluble substances

solutions

Share your list with your partner

Where does it belong?

Put each mixture in column A or B. Justify your choice! sand in water, pop, vinegar in oil, gasoline, clear apple juice, brass, soil, silver-coloured dental fillings, smoke, chlorinated pool water, a jar of jelly beans, latex paint, compressed air in a scuba tank, chlorine bleach, pure liquid honey, chicken soup, humidity

A Bblood 24 karat goldconcrete air freshener

Teacher DemonstrationLava Lamp in a Bottle

How does this work?

Think about it……..

Lab Safety ReviewTie back long hairNo loose clothing Wear safety goggles and apronsDispose of solutions properly (NOT DOWN THE

SINK!)Location of eye wash station and fire extinguisherHandle materials and chemicals with careReport all spills IMMEDIATELY

Jigsaw Lab Activity www.siraze.netLEARNING GOAL : Explore the characteristics of solutions.1. Investigate the solubility of some substances in water and

alcohol. Why do some of the solutes dissolve in certain solvents?

2. Investigate the effect of temperature on the solubility of a solid. How does temperature affect the solubility of a solid?

3. Prepare a supersaturated solution. Describe the reaction of supersaturated solution and give information about the heat.

4. Investigate the formation of a precipitate. Write the balanced equation for the precipitation of lead(II)iodide, PbI2.

Mind MapsIn your home groups, create ONE mind map using the following terms:

solubility solute saturatedsolution unsaturated supersaturated

heterogeneous solvent aqueous solution

homogeneous precipitate temperature

Homework

Based on what you observed and discussed today, explain how the lava lamp demo worked.

Student Difficulties Understanding the distinction between the terms clear and colourless. Show

copper II sulfate solution and sodium chloride solution. Ask which solution is colourless (sodium chloride) and which solution is clear (both). Point out a solution should always be clear because it is transparent, but it can be coloured or colourless.

Thinking that increasing the temperature of a solution increases the solubility of gas solutes but in fact, it decreases. The secret to keeping pop fizzy is to keep it cold. The higher the temperature, the less the carbon dioxide molecules will dissolve.

Reading and understanding solubility tables; use a mnemonic “CHOPS NAAA” CHOPS = carbonates, hydroxides, oxides, phosphates & sulphides are mostly insoluble

NAAA = nitrates, acetates, alkali metals & ammonium are mostly soluble *have students create a VIP to remember rules and steps Determining whether a solvent/solute is polar or nonpolar; review

intermolecular forces, draw Lewis structures of the solvents, make molecular models of solutes or do polar and nonpolar solvents lab (listed in summary)

Practical Applications & SocietalImplications changes in temperature or atmospheric pressure

affect the solubility of oxygen in lake water contents/effects of traditional cleaning solvents vs.

“green” solventswater treatment; reducing individual “water footprint”reactions in the human body all occur in solutionIV solutions consist of glucose and water alloys such as steel, brass and bronze have industrial

and commercial applications

Expectations: E2.1 - use appropriate terminology related to aqueous solutions and solubilityE2.4 – conduct an investigation to analyse qualitative and quantitative properties of solutionsE3.2 – explain the process of formation for solutions that are produced by dissolving ionic and molecular compoundsE3.3 - Explain the effects of changes in temperature and pressure on the solubility of solids, liquids

and gases  

Assessment Concept Attainment Activity (whole group) -

Assessment for Learning: K/UTeacher observes students during lab and asks

guiding questions, records anecdotal comments Assessment for Learning: CMind Map (small group) Assessment for/as Learning: AHomework - How does lava lamp work? Assessment for Learning: T/IAssessment of Learning – at end of lesson sequence

Other Activities & LabsClick here for Solubility Song

Click here for polar and nonpolar solvents lab

Click here for supersaturated solution demo