Canonical lesson CHEMISTRY20-U3-L29 · outcome 20-C2.9k · depth CURRICULUM_BASELINE

Unit C: Solutions, Acids, Bases and Equilibrium intro - outcome 20-C2.9k

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U3-L29
• Official outcome: 20-C2.9k (KNOWLEDGE)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

define neutralization as a reaction between hydronium and hydroxide ions

Learning intention

Meet 20-C2.9k 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

Neutralization in water: H3O+(aq) + OH−(aq) → 2 H2O(l) (or H+ + OH− → H2O). The spectator ions remain. The net ionic equation is the same for strong acid + strong base. Salt and water are the stoichiometric products in the molecular equation.

Worked example

HCl + NaOH: Na+ and Cl− spectators; net H3O+ + OH− → 2 H2O. H2SO4 + 2 KOH similarly reduces to the same net ionic if both are strong and fully ionized.

Guided practice

1. Write complete ionic and net ionic for HNO3(aq) + KOH(aq). Spectators identified. Do not copy HCl/NaOH only.
2. Near-miss: leaving K+ and NO3− on the net ionic. Mark the first wrong line.

Independent practice

1. H2SO4 + 2 NaOH if both treated as strong/fully ionized in this pack’s approximation - net?
2. Two sentences: neutralization as H3O+ + OH−.
3. School dilute acids/bases only; no home drain-cleaner neutralization.

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

Writing neutralization as “mix two cleaners until it smells like a pool.” Forbidden chemistry.

Safety and lab register

Setting: concentration and pH on paper or school-prepared dilute solutions. Red-cabbage indicator is classroom-supervised or photo/dataset. No concentrated acids or bases. No tasting. Dilution math is not a licence to mix cleaners. Forbidden: bleach+acid, drain opener, battery acid, undiluted pool chemicals. AI Tutor must not invent titrations or acid labs outside the register.

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

Formative evidence

Net ionic for a strong acid + strong base with spectators listed.

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

AI Tutor / human tutor

Ground on 20-C2.9k. 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.