1. What is pH?

pH is a measure of the acidity or basicity of an aqueous solution. It is defined as the negative logarithm (base 10) of the hydrogen ion concentration. The pH scale ranges from 0 to 14, with 7 being neutral.

2. How Does the Calculator Work?

The calculator uses the pH formula:

Where:

• \( [H^+] \) — Hydrogen ion concentration (mol/L)

Explanation: The pH scale is logarithmic, meaning each whole pH value below 7 is ten times more acidic than the next higher value.

3. Importance of pH Calculation

Details: Maintaining proper pH in pool water is crucial for swimmer comfort, equipment longevity, and effective disinfection. Ideal pool pH ranges from 7.2 to 7.8.

4. Using the Calculator

Tips: Enter the hydrogen ion concentration in mol/L. The value must be greater than 0. For pool water testing, use a reliable pH test kit or digital pH meter.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal pH for swimming pools?
A: The recommended range is 7.2 to 7.8. This range is comfortable for swimmers' eyes and skin while maintaining chlorine effectiveness.

Q2: How often should I test pool pH?
A: Test pH at least twice per week for residential pools, and daily for commercial pools. More frequent testing may be needed after heavy use or rain.

Q3: What causes pH to change in pools?
A: Factors include: addition of chemicals, swimmers (sweat, oils), rainwater, aeration, and organic debris.

Q4: How do I adjust pool pH?
A: Use pH increaser (sodium carbonate) to raise pH or pH decreaser (sodium bisulfate) to lower pH. Always follow manufacturer instructions.

Q5: Why is pH important for pool maintenance?
A: Proper pH ensures: effective chlorine disinfection, prevents scaling/corrosion, maintains water clarity, and provides swimmer comfort.