Canonical lesson CHEMISTRY20-U4-L21 · outcome 20-D2.2s · depth CURRICULUM_BASELINE

Unit D: Quantitative Relationships in Chemical Changes - outcome 20-D2.2s

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U4-L21
• Official outcome: 20-D2.2s (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 between and among observable variables and use a broad range of tools and techniques to gather and record data and information • perform a titration to determine the concentration of an acid or a base restricted to strong monoprotic acid-strong monoprotic base combinations (PR-NS3) • use probes and software to collect titration data (PR-NS2) [ICT C6-4.4] • research methods used by industry to reduce emissions (PR-ST1) [ICT F2-4.4] • design a prototype of a chemical industrial plant (PR-ST2)

Learning intention

Meet 20-D2.2s 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 strong monoprotic acid-strong monoprotic base titration if scheduled; or use probes/software datasets; research industrial emission reduction with citations.

Worked example

Titration table: V_acid, V_base at end point, calculated c. If no lab: analyze provided curve points. Research: one cited emission-control method.

Guided practice

1. Complete the data table from lab or dataset.
2. Near-miss: prototype “chemical plant” requiring hazardous synthesis. Keep to flowchart paper design if assigned.

Independent practice

1. Calculate unknown concentration.
2. One research sentence with citation.
3. Indicator end point recorded honestly.

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

Inventing titres.

Safety and lab register

Setting: School only or dataset. Goggles. No industrial chemicals at home. 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

Titration (or dataset) results + one citation.

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

AI Tutor / human tutor

Ground on 20-D2.2s. 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.