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acids, bases, ph h2o + h2o = h3o + and oh - by convection we write: h2o = h + and oh - ph = 7,...

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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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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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Page 1: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

Acids Bases pH

1048673H2O + H2O = H3O + and OH -

1048673by convection we write

H2O = H + and OH -

1048673pH = 7 neutral at equilibrium [H + ] = [OH -]

pH

Scale = 0-14

1048673acid dissociates H + pH below 7

eg HCl = H + and Cl -

1048673base dissociates OH - accepts H + pH above 7

ex NaOH = Na + and OH -

ex NH3 + H = NH4

Measuring pH using plant pigment41 and 42

Anthocyanins = plant pigments in cabbage used as pH indicator eg red at low pH

1048673Procedure

1048673make standards with the following pH buffers and record their color

2 4 6 7 8 10 12

Compare unknown(42)

Ex 43

The pH meter is more accurate than plant

indicators

1048673ProcedureCalibrate pH meter using pH 4 and pH 7

Determine pH of substances with pH meter and pH paper

Buffers- 44

Buffer prevents sudden pH changes

1048673Procedure1048673determine the buffering capacity of two substances (A amp B)

Follow the book instructions

1048673Graph your results for A amp B

1048673Record which is the better buffer

1048673

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo
Page 2: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

pH

Scale = 0-14

1048673acid dissociates H + pH below 7

eg HCl = H + and Cl -

1048673base dissociates OH - accepts H + pH above 7

ex NaOH = Na + and OH -

ex NH3 + H = NH4

Measuring pH using plant pigment41 and 42

Anthocyanins = plant pigments in cabbage used as pH indicator eg red at low pH

1048673Procedure

1048673make standards with the following pH buffers and record their color

2 4 6 7 8 10 12

Compare unknown(42)

Ex 43

The pH meter is more accurate than plant

indicators

1048673ProcedureCalibrate pH meter using pH 4 and pH 7

Determine pH of substances with pH meter and pH paper

Buffers- 44

Buffer prevents sudden pH changes

1048673Procedure1048673determine the buffering capacity of two substances (A amp B)

Follow the book instructions

1048673Graph your results for A amp B

1048673Record which is the better buffer

1048673

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo
Page 3: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

Measuring pH using plant pigment41 and 42

Anthocyanins = plant pigments in cabbage used as pH indicator eg red at low pH

1048673Procedure

1048673make standards with the following pH buffers and record their color

2 4 6 7 8 10 12

Compare unknown(42)

Ex 43

The pH meter is more accurate than plant

indicators

1048673ProcedureCalibrate pH meter using pH 4 and pH 7

Determine pH of substances with pH meter and pH paper

Buffers- 44

Buffer prevents sudden pH changes

1048673Procedure1048673determine the buffering capacity of two substances (A amp B)

Follow the book instructions

1048673Graph your results for A amp B

1048673Record which is the better buffer

1048673

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo
Page 4: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

Ex 43

The pH meter is more accurate than plant

indicators

1048673ProcedureCalibrate pH meter using pH 4 and pH 7

Determine pH of substances with pH meter and pH paper

Buffers- 44

Buffer prevents sudden pH changes

1048673Procedure1048673determine the buffering capacity of two substances (A amp B)

Follow the book instructions

1048673Graph your results for A amp B

1048673Record which is the better buffer

1048673

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo
Page 5: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

Buffers- 44

Buffer prevents sudden pH changes

1048673Procedure1048673determine the buffering capacity of two substances (A amp B)

Follow the book instructions

1048673Graph your results for A amp B

1048673Record which is the better buffer

1048673

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo
Page 6: Acids, Bases, pH H2O + H2O = H3O + and OH - by convection we write: H2O = H + and OH - pH = 7, neutral,at equilibrium, [H + ] = [OH -]

45 How Effective are StomachAntacids- Instructor demo

Antacid used to neutralize excess acid

1048673Procedure1048673ompare different antacids

Rolaids Tums Alka-Seltzer

1048673determine effectiveness of antacids per gram( use 05 grams of each)

1048673run a control

  • Acids Bases pH
  • pH
  • Measuring pH using plant pigment 41 and 42
  • Ex 43
  • Buffers- 44
  • 45 How Effective are Stomach Antacids- Instructor demo

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