Today we are extracting citric acid from some large large lemons. Citric acid is quite a useful molecule in general, but I don't have any particular uses for it. It is mostly used as a pH buffering agent in chemistry and isn't use in direct synthesis.

A buffering solution is a solution that resists pH change. It is useful in synthesis when you need to keep the pH relatively constant during a reaction.

In my Cadaverine video, I used citric acid to make a pH buffer solution:    • Making cadaverine  

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Nile talks about lab safety:    • Chemistry is dangerous.