🎯 Objective
Compare pH values of strong and weak acids at the same concentration (0.1 M) to understand the concept of degree of ionization.
Select Concentration
Theory
Strong Acids
Completely ionize in water (α ≈ 1)
HCl → H⁺ + Cl⁻ (100%)
Weak Acids
Partially ionize in water (α << 1)
CH₃COOH ⇌ H⁺ + CH₃COO⁻
pH Formula
pH = -log[H⁺]
⚠️ Safety
- HCl and H₂SO₄ are corrosive — even dilute solutions irritate skin and eyes; wear goggles.
- Never dilute acid by adding water to it — add acid to water, slowly, as it is exothermic.
- Never taste or pipette by mouth; use a dropper/pH meter.
- Rinse any splashes with plenty of water and inform your teacher.
Acidic
Neutral
Basic
01234567891011121314
7.0
pH
Strong Acid
HCl
0.1 M
pH: --
Strong Acid
H₂SO₄
0.1 M
pH: --
Weak Acid
CH₃COOH
0.1 M
pH: --
Weak Acid
H₂CO₃
0.1 M
pH: --
Click on a beaker to measure its pH with the pH meter
🔮 Predict First
✓ Prediction locked — measure the
beakers to test it.
Lab Notebook
Observations will appear here...