Canonical lesson CHEMISTRY20-U4-L06 · outcome 20-D1.1sts · depth CURRICULUM_BASELINE

Unit D: Quantitative Relationships in Chemical Changes - outcome 20-D1.1sts

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U4-L06
• Official outcome: 20-D1.1sts (STS)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

explain that the products of technology are devices, systems and processes that meet given needs; however, these products cannot solve all problems (ST6) [ICT F2-4.4] • analyze the chemical reactions involved in various industrial and commercial processes and products that use stoichiometric and chemical principles: − production of urea − fertilizers − fuel combustion − water treatment − air bag deployment − neutralization of excess stomach acid

Learning intention

Meet 20-D1.1sts 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

Technology products (fertilizers, combustion, water treatment, air bags, antacids) use stoichiometric planning - and still cannot solve every problem (ST6).

Worked example

Card: urea production needs mole ratios; air bag gas amount is engineered (description only). Student: pick one process and state a stoichiometric need + one limitation (waste, energy, safety).

Guided practice

1. Complete the process→ratio→limitation row.
2. Near-miss: home acid + carbonate “air bag.” Forbidden.

Independent practice

1. Second industrial example from the POS list.
2. Two sentences: devices cannot solve all problems.
3. No practical fabrication.

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

Dissecting air bags or synthesizing fertilizers at home.

Safety and lab register

Setting: Paper. No pyrotechnics, no fertilizer synthesis. 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

One industry stoichiometry brief with a limitation.

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

AI Tutor / human tutor

Ground on 20-D1.1sts. 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.