Conversion of 100 ppm to Molar Concentration (mol/L)
Introduction
Concentration is a fundamental concept in chemistry, and it can be expressed in various units. Two common units of concentration are parts per million (ppm) and molar concentration (mol/L). In this article, we will discuss how to convert 100 ppm to molar concentration (mol/L).
What is ppm?
Parts per million (ppm) is a unit of concentration that represents the number of units of a substance per million units of a solution. It is commonly used to express the concentration of a substance in water or air. For example, 100 ppm of a substance in water means that there are 100 units of the substance per million units of water.
What is mol/L?
Molar concentration, denoted by the unit mol/L, is a measure of the number of moles of a substance per liter of solution. It is a more precise unit of concentration than ppm, as it takes into account the molecular weight of the substance.
Conversion Formula
To convert 100 ppm to molar concentration (mol/L), we need to know the molecular weight of the substance. The formula for the conversion is:
mol/L = (ppm x MW) / (1000 x 1000)
where:
- ppm is the concentration in parts per million
- MW is the molecular weight of the substance
- 1000 is the conversion factor to convert grams to milliliters
- 1000 is the conversion factor to convert milliliters to liters
Example Conversion
Suppose we want to convert 100 ppm of sodium chloride (NaCl) to molar concentration (mol/L). The molecular weight of NaCl is 58.44 g/mol.
mol/L = (100 x 58.44) / (1000 x 1000) = 0.0584 mol/L
Therefore, 100 ppm of NaCl is equivalent to 0.0584 mol/L.
Conclusion
In this article, we have discussed the conversion of 100 ppm to molar concentration (mol/L). We have derived the formula for the conversion and provided an example of how to use it. By using this formula, you can easily convert ppm to mol/L for any substance, given its molecular weight.
