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 Airport Lounge - Disco Ultralounge by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/ Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100806 Artist: http://incompetech.com/