Q:

What does PH stand for in chemistry?

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Quick Answer

The symbol pH stands for the "power of hydrogen." The pH of a solution measures how many hydrogen ions are present in a solution. The numbers on the pH scale tell whether a solution is acidic or basic.

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Full Answer

Values for pH usually run from 0 to 14, with lower numbers representing extremely acidic substances and higher numbers delineating substances that are strong bases. Pure water has a neutral pH, which is 7. Concentrated hydrochloric acid is extremely acidic and registers at a pH of 0. A concentrated strong base, such as sodium hydroxide, or lye, has a pH of 14. The pH of substances is measured by using a pH meter or with red and blue litmus paper.

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Related Questions

  • Q:

    How do you find the PH of a substance?

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    The PH of a substance is found by using the PH scale, which measures how acidic or basic substances are. The PH scale determines how strong or weak acids and bases are by measuring the activity of hydrogen ions in certain substances, state experts at UC Davis.

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  • Q:

    What is the pH of NaCl?

    A:

    The pH value of NaCl, which is sodium chloride, is 7, making NaCl a neutral substance. While substances with pH values of 7 are considered neutral, those with pH values between 0 and 7 are considered acidic, and those with pH values greater than 7 are considered basic.

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  • Q:

    What is the pH of water?

    A:

    The pH of pure water at 25 degrees Celsius is very close to 7. This pH value indicates that water is neutral, meaning that it is neither acidic nor basic. Acids have pH values lower than 7, and bases have pH values higher than 7.

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  • Q:

    What is a good pH level?

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    A good pH level depends on the substance in question. Some substances are meant to be more acidic and others more basic, while some substances should be neutral. For instance, stomach acid has a pH of 1, while pancreatic secretions are basic with a pH of 8.1.

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