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pH Calculator
Calculate pH values from hydrogen ion concentration with detailed step-by-step process.
pH Calculator
Calculator
Common Examples
Quick Examples:
Pure Water (pH 7)
Lemon Juice (pH 2)
Baking Soda (pH 9)
Neutral Solution
pH Results
-
Neutral Solution
0
2
4
6
7
8
10
12
14
Formula Used
\( \text{pH} = -\log_{10}[\text{H}^+] \)
Where [H+] is the hydrogen ion concentration in mol/L.
For pOH calculations: \( \text{pH} + \text{pOH} = 14 \)
About pH Calculator
This pH Calculator helps you calculate the pH value from hydrogen ion concentration (or vice versa) in various formats. Understanding pH is essential in chemistry, biology, environmental science, and many other fields.
Key Features:
- Calculate pH from hydrogen ion concentration [H+]
- Support for different input formats (molar, scientific notation, pOH)
- Visual pH scale indicator showing acidity/alkalinity
- Detailed step-by-step calculation process
- Common pH examples from everyday substances
Understanding pH:
The pH scale measures how acidic or basic a solution is on a scale from 0 to 14:
- pH < 7: Acidic solution
- pH = 7: Neutral solution
- pH > 7: Basic (alkaline) solution
The pH value is calculated using the negative logarithm (base 10) of the hydrogen ion concentration:
\( \text{pH} = -\log_{10}[\text{H}^+] \)
Where [H+] is the molar concentration of hydrogen ions in the solution, measured in mol/L.
For basic solutions, we can also use pOH, which is related to pH by:
\( \text{pH} + \text{pOH} = 14 \)
pH Scale Background:
The pH scale was devised by Danish chemist Søren Peder Lauritz Sørensen in 1909. The "p" in pH stands for "power of hydrogen." The concept is used to express the acidity or basicity of a solution.
The pH scale is logarithmic, which means that each step on the pH scale represents a 10-fold change in acidity. For example, a solution with a pH of 4 has 10 times more hydrogen ions than a solution with a pH of 5, and 100 times more than a solution with a pH of 6.
Important pH Values to Remember:
- Strong Acids: pH 0-3
- Weak Acids: pH 3-6
- Neutral: pH 7
- Weak Bases: pH 8-11
- Strong Bases: pH 12-14
How to Use This Calculator:
- Select the input type (hydrogen ion concentration, scientific notation, or pOH)
- Enter the value in the appropriate field
- Click "Calculate pH" to see the results
- The calculator will display the pH value, solution type (acidic, neutral, or basic), and a visual representation on the pH scale
References:
Reference this content, page, or tool as:
"pH Calculator" at https://MiniWebtool.com/ph-calculator/ from MiniWebtool, https://MiniWebtool.com/
by miniwebtool team. Updated: Mar 21, 2025