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ACIDS & BASES

Learn the basics of acids and bases in living organisms. Explore the pH scale, indicators, and their importance in maintaining bodily processes. Discover how pH affects enzymes and why it's crucial for health.

dawn-perry
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ACIDS & BASES

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  1. ACIDS & BASES (pH)

  2. ACIDS • Compounds that release a large number of H+ (hydronium ions) in water • The more H+, the stronger the acid • Taste sour

  3. Bases • Compounds that release a large number of OH- (hydroxide ions) in water • The more OH-, the stronger the base • Taste bitter, feel slippery

  4. ACIDS BASES NEUTRAL 0 7 14 Strong Weak Strong • Acids and bases are important to living organisms to maintain their “bodily” processes • pH Scale—measures the strength of an acid or base • Measures the H+ ion concentration. • Spans from 0 to 14

  5. Indicators—a special type of compound that changes color as the pH of a solution changes, thus telling us the pH of a solution.

  6. Litmus—only tells if acid or base, not how strong • Turns red in acid • Turns blue in base • pH paper—will tell strength of acid or base • Turns different colors that match to a number

  7. Humans (& other organisms) have many areas of body with different pH levels • blood = slightly basic • Stomach acid and urine= acidic • Living organisms are very sensitive to changes in pH. • Enzymes can function only at very specific pH’s

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