M1V1=M2V2 (aka C1V1=C2V2) is a magical formula that lets you calculate chemical dilutions forward and backward. How much stock solution do you need to make a final solution with a desired concentration? If you dilute a certain amount of stock solution to a final solution, what is the final concentration? As long as you know 3 of the components, you can use algebra to determine the fourth! In this video, Borna Zareiesfandabadi explains how to use the M1V1=M2V2 formula, including examples, and they describe four different ways to express chemical concentration (mg/ml, M, % and working solution 1X).
M1 = concentration of starting (stock) solution
V1 = volume taken from starting (stock) solution to be diluted
M2 = concentration of final (diluted) solution
V2 = total volume of final (diluted) solution
0:00 Introduction
0:31 Example science article that uses different concentrations
2:03 Why scientists make solutions with different concentrations
3:00 Explanation of M1V1=M2V2 formula
3:25 Example 1 using percent
4:11 Pro-Tip & Warning
5:23 Example 2 using mg/ml
6:29 Example 3 using M
7:35 Example 4 using working solution (X)
9:06 Four ways to express chemical concentration
9:18 Conclusion
Borna Zareiesfandabadi produced this video while they were a student at Durham Technical Community College. This video is copyright 2021 Durham Technical Community College, posted with permission. Funding for this video was generously provided by the Durham Tech Foundation.
The paper about capsule-lacking bacteria that cause intestinal inflammation is M. T. Henke, et al., Capsular polysaccharide correlates with immune response to the human gut microbe Ruminococcus gnavus. PNAS 118 (2021). doi.org/10.1073/pnas.2007595118
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