In this post, I want to share you a simple calculation that may be useful in the future of your process engineering career 😊. This post explains how to convert composition expressed in weight fraction to mol fraction.

Before we jump into the calculation method, let’s first understand that it is important to state the basis of percentage, whether it is expressed in weight basis, molar basis, or volume basis. The abbreviations w/w and v/v are used to designate weight basis and volume basis.

Let’s use examples on how to convert composition expressed in weight fraction to mol fraction.

In this example, we want to express in mol fraction a technical grade hydrochloric acid which has strength of 28% w/w. Read More