Parts per million (ppm) is a unit used to measure very small concentrations of a substance (solute) in a mixture or solution. It is defined as one part of the solute per one million parts of the total solution.

Nov 4, 2025 · PPM (parts per million) measures how many parts of solute are present in one million parts of a solution. Think of it as a ratio — it expresses very small concentrations that would …

Aug 28, 2025 · Parts per million (ppm) expresses a very dilute concentration, indicating how many “parts” of a solute are present in one million “parts” of a solution. It functions as a ratio, often by mass …

Parts Per Million (ppm) concentration calculations tutorial with worked examples for chemistry students

ppm is used to measure chemical concentration, usually in a solution of water. Solute concentration of 1 ppm is solute concentration of 1/1000000 of the solution.

Sep 22, 2025 · To make a ppm solution, the primary step is to calculate the precise mass of solute needed. The fundamental formula for calculating the mass of solute required is: Mass of Solute (mg) …

Parts-per notation Fluorescein aqueous solutions, diluted from 10 000 to 1 part per million in intervals of ten-fold dilution. At 10 000 ppm the solution is a deep red colour. As the concentration decreases, …

Example #2: Calculate the molarity of a dye concentration given the molar mass is of the dye 327 g/mol and a dye concentration of 2 ppm.

PPM or Parts Per Million is a unit used to describe very small concentrations of a substance in a larger solution. PPM means 1 per every 1,000,000 or 1/1,000,000.

The term PPM (parts per million) is used to measure very small concentrations of dissolved chemicals in water, laboratory solutions, aquariums, swimming pools, food testing and industrial processes.