Parts Per Thousand Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Parts Per Thousand and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Parts Per Thousand and get quick solutions for your test.

What is Parts Per Thousand?

Parts per thousand, or ppt, is a unit of measure that expresses the proportion of a given substance to the total mass or volume. It is frequently used when describing concentrations in water of various substances such as minerals and pollutants.In most cases, it is expressed as milligrams per liter (mg/L). To calculate parts per thousand (ppt), multiply the concentration by 10^6 and divide by the density of water at that temperature. For example, if a sample contains 1 mg/L chlorine and has a density of 1 g/cm3 at room temperature, then its parts per thousand value would be: 1 mg/L x 10^6 / 1 g/cm3 = 10^6 ppt chlorine Parts per thousand can be an especially useful measure when dealing with very small quantities such as trace amounts of pollutants in water bodies. For example, pollutants such as lead are measured in parts per billion (ppb) rather than mg/l because ppb shows an even lower concentration than ppt does. Therefore, ppb allows for greater accuracy when measuring these trace pollutant levels. Parts per thousand can also be used to describe concentrations in soil or air samples as well as other liquids or gases. In general, it is important to use this unit accurately to determine appropriate thresholds for pollution levels and make informed decisions about how best to manage them.