Throughout your career in science, you will come across making buffers or reagents.  It is therefore critical that you are aware and understand the concept of calculating how much of a particular reagent is required for a given concentration.  Here, I have recorded a 5 minute tutorial entitled “Calculations made easy” which goes over two aspects involved in calculations behind buffer making, namely Molarity and Percentages.  I hope you find this helpful and that it assists in your lab and lecture course work.