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8. Some compounds are classified as acids or bases. The pH scale shows how acidic or how basic these compounds are. The lower the pH, the more acidic a compound is. The higher the pH, the more basic it is. Sodium hydroxide, a compound commonly found in drain cleaners, has a pH of 13. Which of these phrases describes sodium hydroxide? A. slightly basic B. slightly acidic C. highly acidic D. highly basic
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On the pH scale, 7 is neutral. So, if the compound is 1 (6 away from 7) it is highly acidic. If it is a 13 (6 away from 7) it is highly basic. So, D.
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