Uploaded October 2020 | Updated September 2026, 5 days ago

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Last time, we showed you a picture of a series of solutions with a #pH indicator. 🌈
pH is a measure of how #acidic or #basic a solution is. The scale goes from 0-14 where lower values indicate #acidity and higher values indicate basic solutions🧪. #Neutral pH is reached at value 7. Our #blood 🩸 is usually maintained at a pH of around 7.4 and the #stomach acid is 1.5 to 3.5.
To determine the concentration of a solution of a #chemical of unknown concentration, one can make use of #neutralization 🎯. pH indicators might have turning points where they drastically change color upon pH changes. You add one solution of a known concentration (titrant) to your unknown solution and measure exactly how much of the #titrant was needed to observe neutralization indicated by a color change of a pH indicator that you add to the solution 🍃🍂. This volume can then be used to calculate the concentration of the unknown solution. In this video we used #phenolphthalein to determine the concentration of a solution of acetic acid.⚗️
Have a nice Thursday! ☺️
#science #scicomm #lab