1. What is mmol to ppm Conversion?

Definition: This calculator converts concentration from millimoles per liter (mmol/L) to parts per million (ppm or mg/L).

Purpose: It's commonly used in chemistry, medicine, and environmental science to express concentrations in different units.

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( \text{PPM} \) — Concentration in parts per million (mg/L)
• \( \text{mmol/L} \) — Concentration in millimoles per liter
• \( \text{MW} \) — Molecular weight of the substance (g/mol)

Explanation: Since 1 mmol = 1/1000 mol and 1 ppm = 1 mg/L, multiplying mmol/L by molecular weight (g/mol) gives concentration in mg/L (ppm).

3. Importance of Unit Conversion

Details: Different fields use different concentration units. This conversion allows comparison and standardization across disciplines.

4. Using the Calculator

Tips: Enter the concentration in mmol/L and the molecular weight of the substance in g/mol. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mmol/L and ppm?
A: mmol/L is molar concentration (number of molecules), while ppm is mass concentration (weight per volume).

Q2: Where is this conversion commonly used?
A: Medical labs (blood tests), water quality testing, and chemical solutions preparation.

Q3: How do I find the molecular weight?
A: Sum the atomic weights of all atoms in the molecule (from periodic table).

Q4: Does this work for all substances?
A: Yes, as long as you know the correct molecular weight of the substance.

Q5: What about temperature and pressure effects?
A: This conversion is temperature-independent for aqueous solutions.