pH Balance Board

Compare invented solution cards and virtual pH indicators to explain which color change shows the balance point.

Chemistry - Chemistry/Biology Pack 2

Symbolic chemistry model pH Balance Board symbolic endpoint visualizationEducational toy model only

Titrant added0.0 mL

pH1.00

Equivalence25.0 mL

Keep adding titrant — the solution is still acidic.

Observation pass0.45 s

Virtual pH indicator9.8 cards

pH zone1 zones

Balance boundary0.05Color change preview5 bands

Activity objective

Compare invented solution cards and virtual pH indicators to explain which color change shows the balance point.

Teacher guidance

Ask what stayed the same before discussing the reaction.
Use particle sketches before symbolic notation.
Use shape and labels with color-coded substances.

Evidence checklist 0/5

Prediction before adjustment recorded.
Before and after color bands compared.
Balance evidence and uncertainty note recorded.
Invented solution cards stayed symbolic.
Balance boundary explains why this is not a real chemistry procedure.

Cross-platform readiness3/3

Web demo playusable

titration-station renders as a lab toy model with adjustable controls, a checklist, and public safety copy.

Keep rendered route, console, network, and safe-copy checks attached before release embedding.

Native mobile screencontract ready

The surface uses touch-sized controls, a single-column mobile layout, no hover-only actions, and no raw child media capture.

Port the same controls into the native shell and verify phone, tablet, offline resume, reduced motion, and bottom-rail navigation.

ChromeOS input paritycontract ready

The web surface keeps range controls, stepper buttons, evidence capture, and review links available to keyboard, pointer, and touch users.

Capture Chromebook-class keyboard, pointer, touch, reduced-motion, and timing proof before widening classroom rollout.

Public copy and safety

Use symbolic lab language only. Do not instruct learners to mix real substances.
This is a symbolic classroom chemistry model using invented solution cards and virtual pH indicators. No real acids, bases, reagents, mixing, lab procedure, chemical handling, medical testing, drinking-water safety testing, or home experiment instruction is involved.
No raw device data, child media, or biometric input.

Build packet status

Teacher review focuses on color-change evidence, uncertainty, and the balance boundary before classroom sharing.

Asset assemblyControl wiringEvidence captureRelease gate

Cross-platform readiness3/3

Web demo playusable

titration-station renders as a lab toy model with adjustable controls, a checklist, and public safety copy.

Keep rendered route, console, network, and safe-copy checks attached before release embedding.

Native mobile screencontract ready

The surface uses touch-sized controls, a single-column mobile layout, no hover-only actions, and no raw child media capture.

Port the same controls into the native shell and verify phone, tablet, offline resume, reduced motion, and bottom-rail navigation.

ChromeOS input paritycontract ready

The web surface keeps range controls, stepper buttons, evidence capture, and review links available to keyboard, pointer, and touch users.

Capture Chromebook-class keyboard, pointer, touch, reduced-motion, and timing proof before widening classroom rollout.

Public copy and safety

Use symbolic lab language only. Do not instruct learners to mix real substances.

This is a symbolic classroom chemistry model using invented solution cards and virtual pH indicators. No real acids, bases, reagents, mixing, lab procedure, chemical handling, medical testing, drinking-water safety testing, or home experiment instruction is involved.

No raw device data, child media, or biometric input.