❄️ Polarix — IMF & Water Chemistry
April 2026 · v0.4.0
FEATLevel-aware home page. "What You'll Learn" and "By the End You Should…" content adapts dynamically to On-Level, Pre-AP, or AP when the student changes level.
UXRedesigned home screen. Single focused hero with two-column objectives grid and "Start Learning →" CTA. Removed level badges and clickable module cards — navigation lives in the sidebar.
ARCHLegacy-to-Suite migration complete. Monolithic legacy HTML extracted into a React/Vite shell. Markup, CSS, and runtime logic split into 8 modular classic scripts bootstrapped by bootstrapPolarixApp.js → initializePolarixApp.js. Shared shell (home button, calculator, level selector) loaded as external scripts. Legacy snapshot preserved at Polarix/legacy/.
ARCH8 extracted runtime scripts. Base logic, panels & calculators, stories & labs, phase simulator, IMF comparator, magnet & water analogy, triple point, and particle engine — each in its own file for maintainability.
Dipoles & Polarity — 9-Section Teaching Track
NEWSection 1 · Electronegativity Difference. Pauling scale introduction, ΔEN equation, 3-range bond classification (nonpolar covalent → polar covalent → ionic). Interactive ΔEN slider and worked examples.
NEWSection 2 · Bond Polarity. From ΔEN to δ⁺/δ⁻ partial charges. Dipole arrow conventions, electron density maps, and practice identifying polar vs nonpolar bonds.
NEWSection 3 · Molecular Polarity. "Shape decides whether dipoles cancel." Step-by-step dipole vector addition, VSEPR geometry recap, and polar/nonpolar molecule identification.
NEWSection 4 · Modeling Studio. Build one molecule at a time — interactive molecular construction with live dipole visualization.
NEWSection 5 · Checkpoint 1. Gated assessment — must score 4/4 MCQs on electronegativity, bond polarity, and molecular polarity before advancing.
NEWSection 6 · Dipoles and the Magnet Analogy. Interactive slider blending bar-magnet and molecular dipole visualizations. "Useful model, not perfect copy" — builds intuition for how δ⁺/δ⁻ ends attract.
NEWSection 7 · IMF Types. London dispersion, dipole-dipole, hydrogen bonding, and ion-dipole. Relative strength comparisons, real-molecule examples, and kJ/mol energy values.
NEWSection 8 · Checkpoint 2. 4-question gated checkpoint on dipoles, molecular polarity, and IMF type identification.
NEWSection 9 · Summative Challenge. Comprehensive assessment covering the full EN → polarity → IMF → physical properties pipeline.
Chemistry Stories
NEW4 narrative stories with inline comprehension. "The Frozen Lake" (hydrogen bonding & density anomaly), "The Paper Towel Puzzle" (cohesion, adhesion, capillary action), "The Boiling Point Mystery" (LDF vs dipole vs H-bond ranking), "The Soap Film Secret" (surface tension & polarity). Each tagged by level and IMF topic.
Simulations & Interactive Tools
NEWMolecular Interaction Explorer. 3D canvas simulation with 7 molecules (H₂O, HF, NH₃, Ethanol, Acetone, Hexane, NaCl(aq)). Color-coded force lines (gold H-bond, blue dipole, purple LDF, red ion-dipole). Animated magnifier lens (3.2×) shows kJ/mol labels. Particle view + real molecule view toggle. Temperature slider, speed control (1×–10×), pause/resume.
NEWLive data table & CSV export. 14-column data collection: molecule, temp, phase, speed, force counts, energy-weighted percentages, notes. Record observations, download CSV, compare model values to published experimental data.
NEWIMF Strength Comparator. 6-compound selector with 3D stick/space-fill molecular visualization, relative IMF strength bars, boiling point data, and model-vs-experimental validity scoring.
NEWTriple Point Explorer. Interactive water phase diagram canvas — click to read temperature, pressure, and phase state. Triple point (273.16 K, 611.73 Pa) and critical point (647 K, 218 atm) highlighted.
NEW3D Molecular Viewer. Explore larger molecules beyond the teaching set — phosphoric acid, PCl₃, SF₄, SO₂Cl₂, BF₃, serotonin, aspirin, ethanol, caffeine. Rotate, toggle overlays for δ labels and dipole vectors.
Panels & Overlays
NEWFormula Reference panel. Molarity, molality, and common constants for water — slide-out panel accessible from the sidebar.
NEWCalculator selector. Choose between TI-84 emulator, scientific calculator, or built-in four-function — shared shell calculator with local fallback.
FEATTeacher Mode integration. Shared shell teacher unlock with 4-digit PIN. Teacher-only panels for locked checkpoints and student intervention controls.
March 2026 · v0.3.0
FIXMagnifier works while paused. Force lines, labels, and kJ/mol values render during paused inspection.
SCIIMFs no longer suppressed for gas-phase molecules. Corrected NH₃ H-bond suppression at room temp.
SCINH₃ hydrogen bonding corrected. Detection threshold raised (60 → 72 units) for N–H···N bonds.
FIXDeterministic LDF flicker. Replaced Math.random() with sin-wave for smooth paused magnifier.
February 2026 · v0.2.0
NEWMolecular Interaction Explorer. Full 7-molecule selector: H₂O, HF, NH₃, Ethanol, Acetone, Hexane, NaCl(aq).
FEATAnimated force lines with glow. H-bonds gold, dipole blue, LDF purple, ion-dipole red.
FEATAnimated magnifier (3.2×). 110px lens with labeled IMF lines and energy values.
FEATSpeed slider & expanded 3D box. 1×–10× speed, 190×160×160 box, N=32 particles.
FEAT14-column live data table. Temperature, phase, speed, IMF counts, energy %, notes.
January 2026 · v0.1.0
NEWInitial launch. Phase Transition Simulator, CER Lab, IMF Comparator with 3D canvas.
