4Acids, Bases, pH

4Acids, Bases, pH - ?Procedure:Calibrate pH meter using pH...

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Acids, Bases, pH ?H2O + H2O = H3O + and OH - ?by convection we write: H2O = H + and OH - ?pH = 7, neutral ,at equilibrium, [H + ] = [OH -]
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pH Scale = 0-14 ?acid: dissociates H + , pH below 7, eg. HCl = H + and Cl - ?base: dissociates OH - accepts H + ,pH above 7 ex. NaOH = Na + and OH - ex. NH3 + H = NH4
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Measuring pH using plant pigment 4.1 and 4.2 Anthocyanins = plant pigments in cabbage used as pH indicator eg red at low pH ?Procedure: ?make standards with the following pH buffers and record their color: 2, 4, 6, 7, 8, 10, 12. Compare unknown(4.2)
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Ex 4.3 The pH meter is more accurate than plant indicators.
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Unformatted text preview: ?Procedure:Calibrate pH meter using pH 4 and pH 7 Determine pH of substances with pH meter and pH paper Buffers- 4.4 Buffer: prevents sudden pH changes ?Procedure:?determine the buffering capacity of two substances (A & B) Follow the book instructions ?Graph your results for A & B ?Record which is the better buffer ? 4.5 How Effective are Stomach Antacids- Instructor demo Antacid: used to neutralize excess acid ?Procedure:?ompare different antacids Rolaids, Tums, Alka-Seltzer ?determine effectiveness of antacids per gram( use 0.5 grams of each) ?run a control...
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4Acids, Bases, pH - ?Procedure:Calibrate pH meter using pH...

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