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What is the pH of NaOH?

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Quick Answer

The pH of NaOH is 14. NaOH, or sodium hydroxide, is a highly caustic substance and is an alkali, or base. Sodium hydroxide is a white solid at room temperature.

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Full Answer

NaOH, commonly called lye, is used very often in cleaning products like soap and oven cleaner. With a pH of 14, NaOH is a very strong base and burns tissues on contact. In contrast, HCl, or hydrochloric acid, is an extremely acidic substance and rates a pH of 0.

The pH scale measures how acidic or basic a substance is. Anything with a pH higher than 7 is a base, whereas substances with a pH lower than 7 are acids. Most substances range from 0 to 14 on the pH scale.

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