Canonical lesson CHEMISTRY20-U3-L17 · outcome 20-C1.1s · depth CURRICULUM_BASELINE

Unit C: Solutions, Acids, Bases and Equilibrium intro - outcome 20-C1.1s

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U3-L17
• Official outcome: 20-C1.1s (SKILL)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

formulate questions about observed relationships and plan investigations of questions, ideas, problems and issues • design a procedure to identify the type of solution (IP-NS2) • design a procedure to determine the concentration of a solution containing a solid solute (IP-NS2) • describe procedures for the safe handling, storage and disposal of materials used in the laboratory, with reference to WHMIS and consumer product labelling information (IP-SEC3, PR-NS5)

Learning intention

Meet 20-C1.1s 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

Design procedures to identify solution type and determine concentration of a solid solute; WHMIS first. Prefer school glassware; dataset alternative allowed.

Worked example

Plan A: conductivity + litmus to classify. Plan B: dry a known volume and mass residue for approximate g/L (school). Safety: goggles, no tasting.

Guided practice

1. Write Plan A with variables and WHMIS.
2. Near-miss: home drain-cleaner “unknown.” Forbidden.

Independent practice

1. Write Plan B or dataset alternative.
2. Disposal line.
3. Success criteria: classification + concentration method named.

Diagram / whiteboard

Approved diagram id chem20-ph-scale - pH scale / solution concentration axes. 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

Tasting unknown solutions.

Safety and lab register

Setting: School unknowns only or paper dataset. No tasting. 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

Two plans (or plan + dataset) on one page.

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

AI Tutor / human tutor

Ground on 20-C1.1s. 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.