Concentration to PH Calculator

Acid:

Concentration:

[H⁺] Unit:

1. What is the pH and [H⁺] Calculator from Acid Concentration?

Definition: This calculator determines the pH and [H⁺] concentration of a solution based on the concentration of a selected acid, with customizable units for both input and output. It also supports custom acids by entering a Ka value.

Purpose: It helps chemists, students, and researchers calculate pH and hydrogen ion concentration for acid solutions, useful in chemistry, biology, and environmental science.

2. How Does the Calculator Work?

The calculator uses these principles:

\[ \text{pH} = -\log_{10}([\text{H}^+]) \]

Where:

\( [\text{H}^+] \) — Hydrogen ion concentration (in selected output unit: M, mM, µM, nM, pM, fM)
For strong acids, \( [\text{H}^+] = \text{Concentration} \) (full dissociation).
For weak acids, \( [\text{H}^+] \approx \sqrt{K_a \times \text{Concentration}} \), where \( K_a = 10^{-\text{pKa}} \) or user-provided Ka.

Explanation: Select an acid or choose "Custom Acid" and enter a Ka, input concentration with a unit (M, mM, µM, nM, pM, fM, aM, zM, yM), choose the [H⁺] output unit (M, mM, µM, nM, pM, fM), and the calculator computes pH and [H⁺].

3. Importance of pH and [H⁺] Calculation

Details: pH and [H⁺] measurement are crucial for understanding acidity, biological processes, industrial applications, and environmental conditions. Accurate values help in chemical reactions, buffer design, and health assessments.

4. Using the Calculator

Tips: Choose an acid or "Custom Acid" (enter Ka), input a positive concentration with its unit, select the [H⁺] output unit, and click "Calculate." For custom acids, provide a valid Ka (e.g., 1.8e-5 for acetic acid). Results show pH and [H⁺] in the chosen unit.

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