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pH Calculator

⚗️pH Calculator

H⁺ concentration (mol/L)

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We're working on a comprehensive educational guide for the pH Calculator in your language. The content below is shown in English.

Mikä on pH Calculator?

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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.

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Kaava

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f(x)pH = −log₁₀[H⁺] where [H⁺] is the hydrogen ion concentration in mol/L

Muuttujan selitys

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Symboli	Nimi	Yksikkö	Kuvaus
H	10^(−pH)	—	10^(−pH)
L	L value	—	Variable used in the calculation

Kuinka pH Calculator

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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

Ratkaistut esimerkit

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Esimerkki 1

Annettu:[H⁺] = 0.001 mol/L

Tulos:pH = 3

−log₁₀(10⁻³) = 3. Acidic (vinegar level)

Esimerkki 2

Annettu:pH = 11

Tulos:[H⁺] = 10⁻¹¹ mol/L

Strongly alkaline — bleach, ammonia

Käytännön sovellukset

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Academic homework and exam preparation

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Engineering and architecture calculations

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Everyday measurement tasks around the home

Common pH Values

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Substance	pH	Category
Battery acid	0	Extremely acidic
Gastric acid (stomach)	1–2	Very acidic
Vinegar / lemon juice	2–3	Acidic
Coffee	5	Mildly acidic
Pure water	7	Neutral
Baking soda	9	Mildly alkaline
Bleach	12	Strongly alkaline

Usein kysytyt kysymykset

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What is Ph?

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.

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Vain tiedoksi. Tämä työkalu ei korvaa ammattimaista lääketieteellistä neuvontaa, diagnoosia tai hoitoa. Ota aina yhteyttä pätevään terveydenhuollon ammattilaiseen.

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pH vs pOH

Mathematically verified

Reviewed October 2026

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