Autoionization of Water
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Water acts as a base when reacted with a strong acid. This seems odd, since we know water is neutral. Water is an amphiprotic compound, meaning it can act as either an acid or a base. When an acid reacts with water, the water will act as a base. When a base reacts with water, the water will act as an acid. Water also autoionizes, meaning it can form H+ and OH-. This video shows how two water molecules react to form hydronium ion (H3O+, an acid), and OH-, but is still overall pH-neutral.
Source: Khan Academy, https://youtu.be/NUyYlRxMtcs
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Last modified: Monday, 4 March 2024, 1:27 PM