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pH is a logarithmic scale measuring the acidity or alkalinity of a solution, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral (pure water at 25°C). Each unit represents a 10× change in hydrogen ion concentration.
Fórmula
- H
- 10^(−pH) — 10^(−pH)
- L
- L value — Variable used in the calculation
Guia passo a passo
- 1pH = −log₁₀[H⁺] where [H⁺] is the hydrogen ion concentration in mol/L
- 2[H⁺] = 10^(−pH)
- 3pOH = 14 − pH (at 25°C)
- 4Acidic: pH < 7 | Neutral: pH = 7 | Alkaline (basic): pH > 7
Exemplos resolvidos
Perguntas frequentes
What is Ph?
pH is a logarithmic scale measuring the acidity or alkalinity of a solution, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral (pure water at 25°C). Each unit represents a 10× change in hydrogen ion concentration
How accurate is the Ph calculator?
The calculator uses the standard published formula for ph. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Ph calculator use?
This calculator works with inches, Celsius. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Ph calculator use?
The core formula is: pH = −log₁₀[H⁺] where [H⁺] is the hydrogen ion concentration in mol/L. Each step in the calculation is shown so you can verify the result manually.