1. What is the Molecular Weight to Concentration Formula?

The molecular weight to concentration formula converts between molarity (moles per liter) and mass concentration (grams per liter) using the molecular weight of the substance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Concentration (g/L)
• \( MW \) — Molecular weight (g/mol)
• \( M \) — Molarity (mol/L)

Explanation: The formula converts the number of moles per liter to grams per liter by multiplying by the molecular weight and dividing by 1000 for unit conversion.

3. Importance of Concentration Calculation

Details: Accurate concentration calculation is essential for preparing solutions in chemistry and biology experiments, pharmaceutical preparations, and industrial processes.

4. Using the Calculator

Tips: Enter molecular weight in g/mol and molarity in mol/L. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 1000 in the formula?
A: The division by 1000 converts from mg/L to g/L, as molecular weight is in g/mol and we typically want concentration in g/L.

Q2: Can this be used for any chemical compound?
A: Yes, as long as you know the exact molecular weight of the compound.

Q3: What's the difference between molarity and concentration?
A: Molarity measures moles per liter, while concentration measures mass per liter. This calculator converts between them.

Q4: How precise should my molecular weight be?
A: Use the most precise molecular weight available, especially for small molecules. For large biomolecules, average molecular weights may be used.

Q5: Can I calculate molarity from concentration?
A: Yes, by rearranging the formula: \( M = \frac{C \times 1000}{MW} \).