Enhanced overlay: Weeks 1-2 bootcamp session-03.html may be taught with this lesson. The bootcamp is not the whole course.

Canonical lesson CHEMISTRY20-U1-L06 · outcome 20-A1.6k · depth ENHANCED_BOOTCAMP_OVERLAY

Unit A: Diversity of Matter and Chemical Bonding - outcome 20-A1.6k

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U1-L06
• Official outcome: 20-A1.6k (KNOWLEDGE)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

explain that ionic compounds form lattices and that these structures relate to the compounds’ properties; e.g., melting point, solubility, reactivity

Learning intention

Meet 20-A1.6k with instruction, practice, and a check. The 10-session bootcamp does not replace this lesson.

Success criteria

1. Restate the outcome in classroom language without swapping in a different unit’s template.
2. Complete the worked-style task for this outcome.
3. Name the lab setting (classroom-supervised / teacher demo / dataset or simulation / forbidden).

Teaching

Ionic compounds form extended 3-D lattices. High melting points follow from strong electrostatic attractions throughout the solid. Many ionic solids dissolve in water as mobile ions; the solid does not conduct, the molten or aqueous ions do. Reactivity (e.g. with water) depends on the ions, not on a molecular shape.

Worked example

NaCl(s): high MP data card (~801 °C), soluble, conducts when aqueous (Session 04 / table), not as a dry crystal. Contrast sucrose: molecular lattice with weak IMFs, lower MP, does not conduct.

Guided practice

1. From the data card only: why NaCl(s) does not conduct but NaCl(aq) can, while sucrose(aq) does not. No kitchen experiment.
2. Near-miss: “electrons flow through dry salt crystals.” Mark the first wrong line.

Independent practice

1. Link high MP of NaCl to a 3-D lattice vs molecular IMFs in sucrose.
2. Two sentences: mobility of ions vs electrons in these examples.
3. Setting: Session 04 classroom-supervised or dataset - name which you would use if no probe is available.

Diagram / whiteboard

Approved diagram id chem20-ionic-lattice - Ionic lattice / bonding sketch. Tutor may open the course whiteboard and display this id. Do not invent hazardous procedures on the board.

Checks for understanding

Use the formative evidence below as the exit check for this outcome. Correct the misconception named in this lesson before praising.

Misconception to repair

Claiming ionic solids conduct because “electrons flow through salt crystals.”

Safety and lab register

Setting: classroom-supervised only for Session 04 conductivity (NaCl / sucrose / ~5% vinegar, 9 V LED or school probe). All other Unit A work is paper, models, data cards, or approved simulation. Forbidden: bleach+acid, bleach+ammonia, flames, tasting, home copy of Session 04, concentrated acids/bases, generating Cl2. AI Tutor must not invent labs outside CHEM20_LOW_RESOURCE_LAB_REGISTER.csv.

Alberta Poison Control if a real exposure is occurring: 1-844-764-7669. The AI Tutor is not a poison centre.

Formative evidence

Table: NaCl(s), NaCl(aq), sucrose(aq) - MP/conductivity claims from data, not invention.

This is not a diploma. Mastery needs instruction + activity + check.

AI Tutor / human tutor

Ground on 20-A1.6k. No false praise. No invented procedures. No silent skip to a different unit. Human tutor if the student describes mixing bleach, tasting, or flames.

Provenance

Official POS wording from ALBERTA_SENIOR_HIGH_OFFICIAL_OUTCOMES.csv. Pack lesson written to replace Wave-4 contaminated canonical markdown.