1. What is a Millimolar to PPM Calculator?

Definition: This calculator converts concentration in millimolar (mM) to parts per million (PPM) using the molar mass of the substance.

Purpose: It helps chemists, biologists, and researchers convert between these common concentration units used in scientific measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( PPM \) — Parts per million (dimensionless)
• \( C \) — Concentration (millimolar, mM)
• \( M \) — Molar mass (grams per mole, g/mol)

Explanation: The concentration in millimolar is multiplied by the molar mass to get mg/mmol, then multiplied by 1000 to convert to PPM (mg/L).

3. Importance of PPM Calculation

Details: PPM is widely used in chemistry, environmental science, and industry to express very dilute concentrations of substances in solutions.

4. Using the Calculator

Tips: Enter the concentration in millimolar (mM) and the molar mass of the substance in g/mol. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What exactly is PPM?
A: Parts per million (PPM) is a unit of concentration representing 1 milligram of substance per liter of solution (mg/L).

Q2: Why multiply by 1000 in the formula?
A: The 1000 converts from millimolar (mM) to molar (M) and from grams to milligrams to achieve the PPM unit.

Q3: Where can I find molar mass values?
A: Molar masses are available in chemistry references or can be calculated from the atomic weights of elements in a compound.

Q4: Does this work for any solute?
A: Yes, as long as you know the correct molar mass of the substance you're measuring.

Q5: How precise is this conversion?
A: The calculation is mathematically exact, but real-world accuracy depends on your measurement precision for concentration and molar mass.