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5/14Have you ever tasted lemon juice and scrounged up your face, because it was too sour? Or enjoyed a refreshing drink of water and wondered why these two liquids are different? You can use this pH Explorer set to test different solutions in your home and learn about liquid chemistry.
What you'll need:
All of the things in our world are made from small particles called atoms. There are many different types of atoms (see Periodic table of elements to learn more), and sometimes they combine with other atoms to make molecules. It is similar to different ingredients combining to create various foods. Water is a molecule made from two Hydrogen atoms and one Oxygen atom (H2O). In certain conditions a Hydrogen atom separates from a water molecule, resulting in two ions, or charged atoms/molecules. Hydrogen will maintain a positive charge (H+), while the remaining molecule (OH-) carries a negative charge. The activity of H+ ions is measured on a pH scale, generally measured in a range of 1-14. A pH < 7 is considered acidic, pH = 7 is neutral, and a pH ˃ 7 is considered basic/alkaline.
Do all of the experiment with a parent present. Some of the household solutions may be dangerous. Make sure you perform the experiment where spills can be easily contained and cleaned up.
pH is an important characteristic of chemicals. Not only it is interesting to study, but living organisms need specific pH environment to survive. For example, acidification of the oceans affects the ocean animals.