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8:49
Khan Academy
Jay
The pH scale
The pH scale is a convenient way to represent the acidity or basicity of a solution. We can calculate the pH of a solution by taking the negative logarithm of the hydronium ion concentration, or pH = -log[H₃O⁺]. At 25°C, a solution with pH \u003c 7 is acidic, a solution with pH \u003e 7 is basic, and a solution with pH = 7 is neutral.
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