Acid Value of KOH Calculator

Acid Value Formula:

\[ AV = \frac{Mw \times V \times N}{Ws} \]

Molecular weight of KOH:

kg/mol

Volume of solution KOH:

m³

Normality of solution:

Weight of sample taken:

Acid Value:

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1. What is Acid Value of KOH?

Definition: The acid value is a measure of the amount of acidic substances, particularly free fatty acids, present in a fat or oil sample.

Purpose: It helps determine the quality and freshness of fats and oils by measuring their acidity.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ AV = \frac{Mw \times V \times N}{Ws} \]

Where:

\( AV \) — Acid Value
\( Mw \) — Molecular weight of KOH (kg/mol)
\( V \) — Volume of solution KOH (m³)
\( N \) — Normality of solution
\( Ws \) — Weight of sample taken (kg)

Explanation: The formula calculates the amount of potassium hydroxide needed to neutralize the free fatty acids in the sample.

3. Importance of Acid Value Calculation

Details: Acid value is crucial for quality control in food, cosmetic, and pharmaceutical industries where fats and oils are used.

4. Using the Calculator

Tips: Enter the molecular weight of KOH (default 0.05611 kg/mol), volume of KOH solution in m³, normality, and sample weight in kg. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical molecular weight for KOH?
A: The molecular weight of KOH is typically 56.11 g/mol (0.05611 kg/mol).

Q2: How do I convert volume from mL to m³?
A: Multiply mL by 0.000001 to convert to m³ (1 mL = 1×10⁻⁶ m³).

Q3: What does a high acid value indicate?
A: High acid values indicate rancidity or degradation of the oil/fat sample.

Q4: What's a normal acid value range for edible oils?
A: Fresh oils typically have acid values below 2 mg KOH/g oil.

Q5: Can I use this for biodiesel analysis?
A: Yes, acid value is an important parameter in biodiesel quality testing.