Question

How to calculate ppm and ppb with formula​

Answer 1

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${\color{maroon}{\textsf{\textbf{ Parts Per Million (ppm) Concentration Calculations }}}}$

Write an equation representing the ppm concentration:

• ppm = mass solute (mg) ÷ volume solution (L)
• Extract the data from the question: mass solute (NaCl) = 0.0045 g.
• Convert the mass in grams to a mass in milligrams: mass NaCl = 0.0045 g = 0.0045 g × 1000 mg/g = 4.5 mg.

${\color{maroon}{\textsf{\textbf{ Parts Per Billion (ppb) Concentration Calculations }}}}$

Calculate the concentration in ppb by multiplying the ratio of the mass of solute to mass of solution by 1 billion, or 1,000,000,000. In the case of a mass ratio of 0.000005, this would give 5,000 ppb.