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🧪 Scientific Precision • 7 Calculation Modes

Solutions & pH
Calculator

Molarity, pH, buffers, and dilution calculations with visual pH scale

Select Calculator Mode

Input Parameters

Select Strong Acid

Concentration (M)

Quick Reference

pH Scale

• pH < 7: Acidic (more H⁺)
• pH = 7: Neutral (pure water)
• pH > 7: Basic/Alkaline (more OH⁻)
• pH + pOH = 14 (at 25°C)

Key Formulas

• pH = -log[H⁺]
• pOH = -log[OH⁻]
• pH = pKa + log([A⁻]/[HA]) (Henderson-Hasselbalch)
• M₁V₁ = M₂V₂ (dilution)

💡 Tips

• Strong acids/bases: Complete dissociation
• Weak acids/bases: Use Ka/Kb for equilibrium
• Buffers: Most effective when pH ≈ pKa
• Dilution: Never add water to acid (add acid to water!)