Molarity from PPB Calculator

How to Calculate Molarity from PPB

Molarity Formula from PPB:

\[ M = \frac{PPB}{MW \times 10^9} \]

Molarity (mol/L):

Definition: This calculator converts concentration from parts per billion (ppb) to molarity (mol/L) using the molecular weight of the substance.

Purpose: It helps chemists, environmental scientists, and researchers convert between these common concentration units.

The calculator uses the formula:

\[ M = \frac{PPB}{MW \times 10^9} \]

Where:

Explanation: The ppb value is divided by the molecular weight and 1 billion (10^9) to convert to molarity.

Details: While ppb is useful for trace concentrations, molarity is needed for stoichiometric calculations in chemical reactions.

Tips: Enter the concentration in ppb and the molecular weight of the substance. Both values must be > 0.

Q1: What's the difference between ppb and molarity?
A: PPB is a mass/mass ratio (ng/g), while molarity is moles per liter of solution.

Q2: Why multiply by 10^9 in the formula?
A: This converts between grams (molecular weight) and nanograms (ppb = ng/g).

Q3: Does this work for aqueous solutions?
A: Yes, assuming the solution density is approximately 1 g/mL (true for dilute aqueous solutions).

Q4: How precise is this conversion?
A: Very precise for dilute solutions. For concentrated solutions, density corrections may be needed.

Q5: Can I convert molarity back to ppb?
A: Yes, use the inverse formula: PPB = M × MW × 10^9.