One part per hundred is 10,000 parts per million, soĥ.25% NaOCl is 5.25×10 4 ppm. Think of percentages as 'parts per hundred'. Solve this problem either by using dilution factors or by setting up a unit conversion calculation. water and clorox) containing 200 ppm of NaOCl? How do I start? I have 100 ml of Clorox containing 5.25% NaOCl and want to make a 1000 ml of total solution (d.i. Worked Examples: Converting Percentage Concentration to ppmįollow these 4 steps to convert percentage concentration to parts.How do I prepare a solution with concentration in ppm from a solution with concentration in percent? M/v (w/v) and m/m (w/w) concentrations and parts per million will be discussed in the following section (after the worked examples of percentage concentration and ppm below). V/v concentration is NOT the same as a %(v/v) concentration M/m concentration is NOT the same as a %(m/m) concentration W/v concentration is NOT the same as a %(w/v) concentration M/v concentration is NOT the same as a %(m/v) concentration Where x is the value of the percentage concentration This is true for other similar percentage concentrations:įor mass/volume percentage concentrations (m/v% or w/v%):įor mass/mass percentage concentrations (m/m% or w/w%): We could write a mathematical expression equating parts per hundred (a percentage) and parts per million (ppm) as shown below: How would we convert that to a concentration in parts per million (ppm) ? This means that there are 9 000 parts of NaCl in every 1 000 000 parts of the solution.īut the concentration of a solution is sometimes given as a percentage.Ī percentage concentration tells you how many parts of solute are present in 100 parts of solution.įor example, the ethanol content in wine is often given as about 12%(v/v), that is, 12% of the volume of the wine is ethanol, or, there are 12 parts of ethanol in every 100 parts of solution. Recall that, in general, concentration tells you how much solute is present in a solution.Ī concentration in parts per million (ppm) tells you how many parts of solute are present in 1 000 000 parts of solution.įor example, a saline solution is a dilute aqueous solution of sodium chloride, NaCl (aq), with a concentration of 9 000 ppm. Parts per million and Percentage Concentration Calculations

How to calculate ppm solution