The pH Scale

Description

Introduces the pH scale from 0 to 14 with a color-gradient bar and real-world substance examples. Explains the logarithmic relationship between pH and hydrogen ion concentration, and animates how H⁺ concentration changes across the scale.

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Phases

#	Phase Name	Duration	Description
1	Title	~3s	Title appears
2	pH bar appears	~5s	Gradient bar 0–14 with tick marks fades in
3	Acidic zone	~5s	0–6 region highlighted red; "Acidic" label; H⁺ = high
4	Neutral zone	~4s	pH 7 highlighted green; "Neutral" label; pure water
5	Basic zone	~5s	8–14 region highlighted blue; "Basic/Alkaline" label; H⁺ = low
6	Substance placement	~8s	Lemon juice, coffee, water, baking soda, bleach placed on scale
7	H⁺ animation	~5s	H⁺ ion dots appear/disappear as pH marker moves
8	Formula display	~4s	MathTex pH = -log[H⁺] shown with brief explanation
9	Outro	~3s	Summary

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Layout

┌─────────────────────────────────────────────┐
│              The pH Scale                   │  ← title
├─────────────────────────────────────────────┤
│                                             │
│  [Red ← acidic ─────── neutral ──── basic → Blue] │ ← pH gradient bar
│  0   1   2   3   4   5   6   7   8   9  10  11  12  13  14
│                                             │
│  🍋 2  ☕ 5  💧 7  🧪 9  🧴 13             │ ← substance labels
│                                             │
│         pH = -log[H⁺]                      │  ← formula
└─────────────────────────────────────────────┘

Area Descriptions

Area	Content	Notes
Top	Title	Fades in
Center	Color gradient pH bar with tick marks	Rectangle segments colored acid→neutral→base
Below bar	Substance icons and labels	Placed at correct pH positions
Bottom	LaTeX formula	pH = -log[H⁺]

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Assets & Dependencies

• Fonts: LaTeX / sans-serif
• Colors: Acid end = #e63946 (red), Neutral = #57cc99 (green), Base end = #4361ee (deep blue)
• Manim version: ManimCE 0.19.1

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Notes

• Build the gradient bar as ~14 colored rectangles interpolated from red to green to blue
• Substance labels appear with a FadeIn from below
• H⁺ concentration bubble changes size logarithmically