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🧪 pH Scale Visualiser
Drag the slider to explore any pH from 0 to 14 — watch the colour change, see the classification and discover real-life examples.
Class 7–10 · Chemistry
7
pHNeutral
Perfectly balanced — neither acidic nor basic.
NEUTRALNeutral
⚗️ Ions: [H⁺] = [OH⁻]
Perfectly balanced — neither acidic nor basic.
Real-life examples near pH 7
💧
Pure Water (H₂O)
pH 7
Perfectly neutral — equal H⁺ and OH⁻ ions.
🩸
Human Blood
pH 7.4
Blood pH must stay 7.35–7.45 — even ±0.4 is fatal.
🥛
Milk / Urine
pH 6
Milk is slightly acidic; fresh milk is ~pH 6.3.
🌊
Sea Water / Egg White
pH 8
Ocean absorbs CO₂, slowly becoming more acidic.
Full pH Scale Reference
0
🔋Battery Acid (H₂SO₄)1
🫃Stomach Acid (HCl)2
🍋Lemon Juice / Vinegar3
🍊Orange Juice / Cola4
☕Tomato Juice / Coffee5
🍵Black Tea / Acid Rain6
🥛Milk / Urine7
💧Pure Water (H₂O)7.4
🩸Human Blood8
🌊Sea Water / Egg White9
🧁Baking Soda Solution10
💊Milk of Magnesia (Antacid)11
🧹Household Ammonia12
🧼Soapy Water13
🫧Bleach (NaClO)14
⚗️Sodium Hydroxide (NaOH)💡 Quick Science Facts
- Each step on the pH scale = a 10× change in acidity. pH 4 is 1,000× more acidic than pH 7!
- pH stands for "potential of Hydrogen" — it measures H⁺ ion concentration.
- Indicators like litmus turn red in acids and blue in bases.
- The pH of your blood is tightly controlled between 7.35 and 7.45. Even pH 7.0 can be life-threatening.
- Rainwater is naturally slightly acidic (pH ~5.6) due to dissolved CO₂ forming carbonic acid.