Titration of water hardness (complexometry explained). Bonus: Calcium in milk

Titration of calcium and magnesium (total hardness) in bottled and tap water by senior high school students from N. Alikarnassos High School in Crete, Greece. Detailed explanation of complexometric titrations is provided. You can also watch determination of calcium in milk using the same principle.
00:00 Intro-Metal ions in water
00:26 Total water hardness-complexometry
00:51 Materials-Preparation of solutions
04:01 Titration of bottled water
05:13 Explaining the method principle
05:56 End of titration-Calculations
07:11 Titration of tap water
07:51 Calcium (and Magnesium) in Milk

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