- Label the pH scale from 0 to 14, with 0 at the top (red) and 14 at the bottom (purple).
- Mark pH 7 in the middle (green) as neutral.
- Colors from red to yellow-green (pH 0–6) are acidic.
- Colors from blue to purple (pH 8–14) are basic.
- Place each item on the scale based on its typical pH:
- Gastric Acid: pH ~1–2 (top red)
- Lemon: pH ~2 (red-orange)
- Soda: pH ~2.5–3.5 (orange)
- Battery: pH ~0–1 (bright red)
- Tomato: pH ~4 (yellow-orange)
- Coffee: pH ~5 (yellow)
- Milk: pH ~6.5–6.7 (light green-yellow)
- Water: pH ~7 (green, neutral)
- Blood: pH ~7.4 (light green-blue)
- Soap: pH ~9–10 (blue-green)
- Ammonia Acid: pH ~11–12 (blue)
- Bleach: pH ~12–13 (dark blue)
- Drain Cleaner: pH ~13–14 (purple)
- Baking Soda: pH ~8.3 (teal)
- Stomach Tablets: pH ~8–10 (blue-green, depending on type)
- Label the top half (pH 0–6) as “Acidic”, middle (pH 7) as “Neutral”, bottom half (pH 8–14) as “Basic”.
Parent Tip: Review the logic above to help your child master the concept of ph scale worksheet.
