The One Left Over Decides
by Anonymous · ⭐ 1 · 🍴 0
🍋 What are acids and bases? When they dissolve in water, acids release H⁺ and bases release OH⁻. The fun part: each particle can release a different number—make more ions with fewer particles! 🎨 Indicators show clues with color. But phenolphthalein is colorless in both acidic and neutral solutions, so it can’t tell them apart. Add all three indicators to see what each one can—and can’t—tell you. ⚗️ Finally, neutralization: H⁺ and OH⁻ pair up one-to-one to make water, and whichever is left over decides the properties. Can you add more acid and still make it neutral? Tap and find out. This app was made with code too · Remix it and add a pH scale!
About this app
Whatever Is Left Decides is an interactive middle-school science app about acids, bases, indicators, and neutralisation. Explore how hydrochloric acid, sulfuric acid, sodium hydroxide, and calcium hydroxide release different numbers of H⁺ or OH⁻ ions per grain. Then test litmus, phenolphthalein, and BTB by solution type, and pair H⁺ with OH⁻ to see how the leftover ions determine whether a mixture is acidic, neutral, or basic.
Use cases
- Middle-school students learning acids and bases
- Teachers demonstrating ion release and neutralisation
- Learners comparing common chemical formulas and ion counts
- Students practising indicator colour interpretation
- Science classrooms exploring the neutralisation point
Features
- Interactive acid and base selection with adjustable grain counts
- Visual comparison of H⁺ and OH⁻ ions released by four substances
- Indicator experiments with litmus, phenolphthalein, and BTB
- Colour-based identification of acidic, neutral, and basic solutions
- Neutralisation simulator showing water formed and leftover ions
- Guided challenges with reset and next-step controls