Enter any 2 values (ppm, molarity, and molar mass) into the calculator to determine the missing variable. For dilute aqueous solutions, ppm is commonly treated as mg/L.
G/Mol To Ppm Formula
The following formula is used to calculate ppm (commonly treated as mg/L for dilute aqueous solutions) from molarity and molar mass.
\text{ppm (mg/L)} = C \cdot MW \cdot 1000Variables:
- ppm is parts per million (often approximated as mg/L in dilute aqueous solutions)
- C is the molar concentration (mol/L)
- MW is the molar mass (g/mol)
To calculate ppm (mg/L), multiply the molarity (mol/L) by the molar mass (g/mol) and then multiply by 1000.
| Molarity (mol/L) | Molar Mass (g/mol) | PPM (≈ mg/L) |
|---|---|---|
| 1.711e-6 | 58.44 | 0.1 |
| 8.556e-6 | 58.44 | 0.5 |
| 1.711e-5 | 58.44 | 1 |
| 3.422e-5 | 58.44 | 2 |
| 8.556e-5 | 58.44 | 5 |
| 1.711e-4 | 58.44 | 10 |
| 3.422e-4 | 58.44 | 20 |
| 4.278e-4 | 58.44 | 25 |
| 5.133e-4 | 58.44 | 30 |
| 6.845e-4 | 58.44 | 40 |
| 8.556e-4 | 58.44 | 50 |
| 0.0010267 | 58.44 | 60 |
| 0.0012834 | 58.44 | 75 |
| 0.0017111 | 58.44 | 100 |
| 0.0025667 | 58.44 | 150 |
| 0.0034223 | 58.44 | 200 |
| 0.0042779 | 58.44 | 250 |
| 0.0085557 | 58.44 | 500 |
| 0.0128336 | 58.44 | 750 |
| 0.0171114 | 58.44 | 1000 |
| Formula used: ppm (mg/L) = Molarity (mol/L) × Molar Mass (g/mol) × 1000. “ppm ≈ mg/L” is a common approximation for dilute aqueous solutions. | ||
What is G/Mol To Ppm?
“g/mol” is a unit of molar mass (molecular weight), not a concentration. In many chemistry problems, ppm is used as a concentration unit (often treated as mg/L for dilute aqueous solutions). Using the molar mass (g/mol), you can convert between molarity (mol/L) and ppm (≈ mg/L) for solutions. Note: ppm conversions for gases (ppmv) or for non-aqueous mixtures require additional information (such as temperature, pressure, or density).
How to Calculate G/Mol To Ppm?
The following steps outline how to calculate ppm (≈ mg/L) from molarity using molar mass.
- First, determine the molarity (C) in mol/L.
- Next, determine the molar mass (MW) in g/mol.
- Next, calculate ppm (mg/L) using the formula: ppm (mg/L) = C × MW × 1000.
- If you need “true” ppm by mass (mg/kg), use the solution density to convert between mg/L and mg/kg.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Molarity (C) = 0.002 mol/L
Molar mass (MW) = 50 g/mol