How To Calculate Molecular Weight

If you are a student and you hear the word molecular weight, the first thing that will enter your mind are big books and never ending computations. For a student, computing molecular weight is a nightmare. And if you feel the same way too, then here's a simple step-by-step process that can guide you in computing molecular weight.

What is a molecular weight? This is the first thing that you should know. From the word itself, molecular weight is the weight of a certain molecules. You should also take note that the unit used for the weight of atoms is Dalton. Water for instance has a molecular weight (MW) of 18 Daltons.

What is the importance of studying the molecular weight?

Let's say you want to conduct a study on the response of multiple honeybees to different solutions of sugars. One way of doing this is to provide different and various solutions and discover which among of these sugars are preferred by the bees.

With this study you can prepare a 35% solution of sucrose, also known as table sugar and a 35% solution of glucose, which can be naturally found in honey. The set-up is almost complete but there is still a problem. The amount of sugar molecules in a volume of each set up is very important. It is a factor on how the bees will react or respond in each sugar. That's the reason why molecular weight has an equal importance. For you to conduct a successful study as in this case, you should know how to compute the molecular weight of the sugar.   

Now, we're getting closer to how to compute molecular weight. Here's the revealing part of it. The truth is, you really don't have to compute the molecular weight of an element because it is already written in a periodic table. But for a certain molecule, you have to add the molecular weight of each element that forms the molecule. In short, it's just simple addition that can answer your questions of weights of molecules.

You might also wonder how molecular weight affects the world of chemistry. Moreover, they are in line with the new trends and technology in our society such as gel permeation. It can be used to determine the weight of a product or chemical reaction. On the other hand, molecular weight is also related to molar mass. Molar mass is undoubtedly the average of molecular weight. It is also known as the atomic weight or atomic mass.

Therefore, computing molecular weight is not really strenuous as what you assume. If you have a periodic table in your hands, every information will flow freely. There is no need to master the calculus or statistics. A simple arithmetic can solve the problem whether it involves a protein molecule, peptides or polymers. So, if you are one of those students, who doesn't know how to start studying molecular weight, then these simple answers can help you a lot. The world of chemistry has many confusing terms but with the right information offered in books and on the Web you can be assured that you're taking the right path.


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