1. What is the Brewer's Friend Water Equation?

The Brewer's Friend Water equation calculates alkalinity in ppm as CaCO3 from bicarbonate (HCO3) concentration. This is important for water chemistry adjustments in brewing beer.

2. How Does the Calculator Work?

The calculator uses the Brewer's Friend Water equation:

Where:

• \( HCO3 \) — Bicarbonate concentration (ppm)
• 50 — Molecular weight of CaCO3 divided by 2
• 61 — Molecular weight of HCO3

Explanation: The equation converts bicarbonate concentration to alkalinity expressed as calcium carbonate equivalent, which is the standard unit for water alkalinity measurement.

3. Importance of Alkalinity Calculation

Details: Accurate alkalinity calculation is crucial for water treatment in brewing, as it affects mash pH, enzyme activity, and ultimately beer flavor and quality.

4. Using the Calculator

Tips: Enter bicarbonate concentration in ppm. The value must be valid (HCO3 > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why convert HCO3 to alkalinity as CaCO3?
A: Alkalinity expressed as CaCO3 is the standard unit in water chemistry and brewing, allowing for consistent measurement and comparison across different water sources.

Q2: What are typical alkalinity values for brewing water?
A: Ideal alkalinity varies by beer style, but generally ranges from 0-150 ppm as CaCO3 for most beer styles.

Q3: How does alkalinity affect brewing?
A: Alkalinity acts as a buffer against pH changes, affecting mash pH, enzyme activity, hop utilization, and ultimately beer flavor and stability.

Q4: Can I use this calculator for other water treatment applications?
A: While designed for brewing, this calculation is applicable to any water treatment where bicarbonate to alkalinity conversion is needed.

Q5: How accurate is this calculation?
A: The calculation provides a good estimate for most brewing applications, but for precise water treatment, comprehensive water analysis is recommended.