Units / Unit A / Polarity, Water, and Solubility

Polarity, Water, and Solubility

Relate polar water to properties; predict solubility with solubility chart (A-GO2-SO6, SO7).

Full lesson guide (printable)

Outcome checklist

Alberta Program of Studies — tick each row when you can explain it without the slide.

A-GO2-SO6
By the end of this lesson you should be able to: Predict whether an ionic compound is relatively soluble in water, using a solubility chart
Self-check: Without looking at your notes, give one example or explanation that shows you meet A-GO2-SO6.
A-GO2-SO7
By the end of this lesson you should be able to: Relate the molecular structure of simple substances to their properties (e.g., describe how the properties of water are due to the polar nature of water molecules, and relate this property to the transfer of energy in physical and living systems)
Self-check: Without looking at your notes, give one example or explanation that shows you meet A-GO2-SO7.
A-GO2
Big idea: Explain, using the periodic table, how elements combine to form compounds, and follow IUPAC guidelines for naming ionic compounds and simple molecular compounds
Self-check: How does today's lesson connect to A-GO2?

Where this shows up later

Unit A — Reaction types: Solutions enable many chemical changes in class.

Glossary

polar: Key vocabulary for this lesson (polar). Use your class notes and the slide explanations to state it in your own words — Alberta Science 10 expects you to use this term correctly in context.
hydrogen bond: Key vocabulary for this lesson (hydrogen bond). Use your class notes and the slide explanations to state it in your own words — Alberta Science 10 expects you to use this term correctly in context.
soluble: Key vocabulary for this lesson (soluble). Use your class notes and the slide explanations to state it in your own words — Alberta Science 10 expects you to use this term correctly in context.
insoluble: Key vocabulary for this lesson (insoluble). Use your class notes and the slide explanations to state it in your own words — Alberta Science 10 expects you to use this term correctly in context.
like dissolves like: Key vocabulary for this lesson (like dissolves like). Use your class notes and the slide explanations to state it in your own words — Alberta Science 10 expects you to use this term correctly in context.

Lab and demo watch-outs

Classroom safety
Follow school rules for equipment, goggles, and fire safety even during thought experiments.
Any time hands-on work is suggested.

Slide 1 of 714%

Hook

Oil and water

Why does oil float and not mix?
Introduce polarity.

Core explanation

We start with a real situation: Why does oil float and not mix? Introduce polarity. Your job is to notice evidence and ask questions before memorizing definitions.

Check your understanding

Can you connect this slide to something we learned earlier today?

Explain moreDeeper teaching notes — read like a tutor explaining the idea

Unit A — Polarity, Water, and Solubility: Polar water dissolves many ionic and polar solutes — 'like dissolves like' has limits. On this slide («Oil and water»), the science story is: Why does oil float and not mix? Introduce polarity. Read like a tutor: connect each bullet to evidence or a model, not memorized wording. Alberta Science 10 expects you to explain ideas in class discussions and written work — this slide supports outcomes A-GO2-SO6, A-GO2-SO7.

Worked example(s)Step-by-step reasoning, not just answers

Apply: Oil and water
1. State the core idea: Why does oil float and not mix?
2. Link to a second point: Introduce polarity.
3. Give one Alberta or daily-life example that fits both ideas.
4. Check your example against the slide — would your teacher agree?
Why this works: Application proves understanding beyond repeating bullets.

Common mistakes to avoid

All ionic compounds dissolve in water.
On «Oil and water», use the slide model and vocabulary (polar, hydrogen bond, soluble, insoluble) to replace this idea.

Try it yourself

Teach «Oil and water» aloud in 60 seconds using two bullets and one vocabulary word from polar.