Canonical lesson CHEMISTRY20-U4-L08 · outcome 20-D1.2s · depth CURRICULUM_BASELINE

Unit D: Quantitative Relationships in Chemical Changes - outcome 20-D1.2s

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U4-L08
• Official outcome: 20-D1.2s (SKILL)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

conduct investigations into relationships among observable variables and use a broad range of tools and techniques to gather and record data and information • translate word equations for chemical reactions into chemical equations, including states of matter for the products and reactants (CT-ST2) • balance chemical equations for chemical reactions, using lowest whole-number coefficients (AI-ST3)

Learning intention

Meet 20-D1.2s 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

Perform: translate word equations to formulas with states; balance with lowest coefficients.

Worked example

Word: solid magnesium + aqueous hydrochloric acid → hydrogen + magnesium chloride solution. Write and balance with states.

Guided practice

1. Balance two more word equations from the pack list.
2. Near-miss: mass-ratio balancing. Mark it.

Independent practice

1. Include one double-replacement with a solubility-card solid.
2. Coefficients as moles sentence.
3. States on every species.

Diagram / whiteboard

Approved diagram id chem20-stoich-mole-map - Mole map stoichiometry flow. 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

Changing formulas to make balancing easy.

Safety and lab register

Setting: Paper equations; wet demos only if teacher provides. 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

Three balanced equations with states.

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

AI Tutor / human tutor

Ground on 20-D1.2s. 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.