pH—Scale to measure how acidic or basic a solution is 0-14 - PowerPoint PPT Presentation

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pH—Scale to measure how acidic or basic a solution is 0-14 PowerPoint Presentation
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pH—Scale to measure how acidic or basic a solution is 0-14

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pH—Scale to measure how acidic or basic a solution is 0-14
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pH—Scale to measure how acidic or basic a solution is 0-14

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  1. pH

  2. pH—Scale to measure how acidic or basic a solution is • 0-14 • Pure water is 7 and neutral (not an acid or base) • Acids—less than 7(lower number more acidic) • Bases—greater than 7(higher number more basic)

  3. Acids • pH less than 7 • Taste sour • Reacts with metals (bubbles) • Acid mixed with base = neutral

  4. Bases • Taste bitter (coffee) • Feel slippery (soap) • Base plus acid= neutral (antacid + stomach acid = neutral)

  5. Neutral • Neither acid nor base • Pure water is 7

  6. Litmus paper • Has a special dye that changes colors in acids and bases

  7. Phenolphthalein • Used to test for bases • Chemical indicator

  8. pH paper • Has a range of colors depending on pH of solution • Compare color paper turns to color on vial