1. What is the Molecular Weight Concentration Formula?

The molecular weight concentration formula converts between molar concentration (μM) and weight concentration (mg/ml) using the molecular weight of the compound. This is particularly useful in protein research and biochemistry.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( CW \) — Weight concentration (mg/ml)
• \( CM \) — Molar concentration (μM)
• \( MW \) — Molecular weight (g/mol)

Explanation: The equation accounts for the conversion between molar units and weight units, with the division by 1000 converting between micrograms and milligrams.

3. Importance of Concentration Conversion

Details: Accurate concentration conversion is crucial for preparing solutions with specific concentrations, comparing studies that report concentrations differently, and ensuring proper experimental conditions.

4. Using the Calculator

Tips: Enter molar concentration in μM and molecular weight in g/mol. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 1000 in the formula?
A: The division by 1000 converts between micrograms (from μM × g/mol) to milligrams for the final mg/ml concentration.

Q2: Can this be used for any molecule?
A: Yes, this conversion works for any molecule as long as you know its exact molecular weight.

Q3: What if my protein has multiple subunits?
A: Use the molecular weight of the complete, assembled protein complex.

Q4: How accurate is this conversion?
A: The conversion is mathematically exact, but accuracy depends on your measurements of concentration and knowledge of the molecular weight.

Q5: Can I convert back from mg/ml to μM?
A: Yes, by rearranging the formula: \( CM = CW \times 1000 / MW \).