pHpH SW: Understanding pH and Conducting a Lab Activity
In this lesson, students will learn about pH and its relationship with the acidity or basicity of a substance. They will conduct a lab activity to classify substances according
- Uploaded on | 2 Views
-
romane
About pHpH SW: Understanding pH and Conducting a Lab Activity
PowerPoint presentation about 'pHpH SW: Understanding pH and Conducting a Lab Activity'. This presentation describes the topic on In this lesson, students will learn about pH and its relationship with the acidity or basicity of a substance. They will conduct a lab activity to classify substances according. The key topics included in this slideshow are . Download this presentation absolutely free.
Presentation Transcript
Slide1pHpH SW classify substances according to their pH by conducting a lab activity. SW classify substances according to their pH by conducting a lab activity. SW explain the relationship between values on the pH scale by using scientific notation. SW explain the relationship between values on the pH scale by using scientific notation.
Slide2How is pH measured? How is pH measured? Concentration of hydrogen (H+) ions in a solution. Concentration of hydrogen (H+) ions in a solution. “pH” = the power of Hydrogen “pH” = the power of Hydrogen Litmus paper = measures the pH Litmus paper = measures the pH
Slide3What is the range on the pH scale for ACIDS? What is the range on the pH scale for ACIDS? Substances with a pH 6 and below. Substances with a pH 6 and below. Lower the number, stronger the acid. Lower the number, stronger the acid.
Slide4What is the range on the pH scale for BASES? What is the range on the pH scale for BASES? Substances with a pH of 8 and above. Substances with a pH of 8 and above. Higher the number, stronger the base. Higher the number, stronger the base.
Slide5What is a substance considered to be if it is neither an acid or a base? What is a substance considered to be if it is neither an acid or a base? pH around 7 (neutral) pH around 7 (neutral) Example: “pure water” Example: “pure water”
Slide6What is the difference between the numbers on the pH scale? What is the difference between the numbers on the pH scale? There is a 10-fold difference. There is a 10-fold difference.
Slide7What does the negative exponent indicate? What does the negative exponent indicate? That the number is less than one. That the number is less than one.
Slide9pH Scale pH Scale 1x10 0 = 1 0 Battery Acid 1x10 0 = 1 0 Battery Acid 1x10 –1 = 0.1 1 Stomach Acid 1x10 –1 = 0.1 1 Stomach Acid 1x10 –2 = 0.01 2 Lemon Juice 1x10 –2 = 0.01 2 Lemon Juice 1x10 –3 = 0.001 3 Soda 1x10 –3 = 0.001 3 Soda 1x10 –4 = 0.0001 4 Acid Rain 1x10 –4 = 0.0001 4 Acid Rain 1x10 –5 = 0.00001 5 Black Coffee 1x10 –5 = 0.00001 5 Black Coffee 1x10 –6 = 0.000001 6 Urine/Saliva 1x10 –6 = 0.000001 6 Urine/Saliva 1x10 –7 = 0.0000001 7 “Pure” Water 1x10 –7 = 0.0000001 7 “Pure” Water 1x10 –8 = 0.00000001 8 Sea Water 1x10 –8 = 0.00000001 8 Sea Water 1x10 –9 = 0.000000001 9 Baking Soda 1x10 –9 = 0.000000001 9 Baking Soda 1x10 –10 = 0.0000000001 10 Great Salt Lake 1x10 –10 = 0.0000000001 10 Great Salt Lake 1x10 –11 = 0.00000000001 11 Ammonia 1x10 –11 = 0.00000000001 11 Ammonia 1x10 –12 = 0.000000000001 12 Soapy Water 1x10 –12 = 0.000000000001 12 Soapy Water 1x10 –13 = 0.0000000000001 13 Bleach 1x10 –13 = 0.0000000000001 13 Bleach 1x10 –14 = 0.00000000000001 14 Liquid Drano 1x10 –14 = 0.00000000000001 14 Liquid Drano
Slide10ActivityActivity Draw the pH scale Draw the pH scale and label with examples and label with examples !!!Go back to your drill and correct!!! !!!Go back to your drill and correct!!!
