Ph Poh H Oh- Calculator For 2

pH and pOH Equations:

\[ pH = -\log_{10}[H^+] \] \[ pOH = -\log_{10}[OH^-] \] \[ pH + pOH = 14 \] \[ [H^+] = 10^{-pH} \] \[ [OH^-] = 10^{-pOH} \]

Solution 1

[H+] Concentration:

mol/L

[OH-] Concentration:

mol/L

pH Value:

pOH Value:

Solution 2

[H+] Concentration:

mol/L

[OH-] Concentration:

mol/L

pH Value:

pOH Value:

Solution 1 Results

[H+] Concentration: [OH-] Concentration: pH Value: pOH Value:

Solution 2 Results

[H+] Concentration: [OH-] Concentration: pH Value: pOH Value:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is pH and pOH?

pH is a measure of hydrogen ion concentration, indicating the acidity or basicity of a solution. pOH is a measure of hydroxide ion concentration. The two are related by the equation: pH + pOH = 14 at 25°C.

2. How Does the Calculator Work?

The calculator uses the fundamental pH equations:

\[ pH = -\log_{10}[H^+] \] \[ pOH = -\log_{10}[OH^-] \] \[ [H^+] \times [OH^-] = 1 \times 10^{-14} \] \[ pH + pOH = 14 \]

Where:

\( [H^+] \) — Hydrogen ion concentration (mol/L)
\( [OH^-] \) — Hydroxide ion concentration (mol/L)
\( pH \) — Measure of acidity (0-14 scale)
\( pOH \) — Measure of basicity (0-14 scale)

3. Importance of pH Calculation

Details: pH calculation is essential in chemistry, biology, environmental science, and many industrial processes. It helps determine solution properties, reaction rates, and biological compatibility.

4. Using the Calculator

Tips: Enter any one value for each solution (H+, OH-, pH, or pOH). The calculator will automatically compute all other related values. You can compare two different solutions side by side.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between pH and pOH?
A: pH + pOH = 14 at 25°C. This is derived from the water ionization constant Kw = [H+][OH-] = 1×10⁻¹⁴.

Q2: What pH values indicate acidic/basic solutions?
A: pH < 7 indicates acidic, pH = 7 indicates neutral, pH > 7 indicates basic solutions.

Q3: Can I enter scientific notation?
A: Yes, you can enter values like 1e-7 for 0.0000001 mol/L concentration.

Q4: Why compare two solutions?
A: Comparing solutions helps understand relative acidity/basicity, which is useful in titration studies, buffer preparation, and chemical reactions.

Q5: Are there limitations to pH calculations?
A: These calculations assume ideal conditions at 25°C. Temperature, ionic strength, and activity coefficients can affect actual pH values.