acids, bases, ph h2o + h2o = h3o + and oh - by convection we write: h2o = h + and oh - ph = 7,...
TRANSCRIPT
![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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/1.jpg)
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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/2.jpg)
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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/3.jpg)
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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/4.jpg)
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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/5.jpg)
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 -]](https://reader036.vdocuments.net/reader036/viewer/2022082518/56649ea95503460f94bad011/html5/thumbnails/6.jpg)
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
-