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The PH Scale Measures the Hydrogen Ion Concentration in a Liquid

Question 201

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The pH scale measures the hydrogen ion concentration in a liquid, which determines whether the substance is acidic or alkaline. A strong acid solution has a hydrogen ion concentration of 10-1 M and would have a pH of 1. A neutral substance has a hydrogen ion concentration of 10-7 M and would have a pH of 7. An unknown liquid is tested and is found to have a hydrogen ion concentration of 10-2. What is the pH?

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