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# PH 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.

## Presentation on theme: "PH 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."— Presentation transcript:

pH 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.

How is pH measured? Concentration of hydrogen (H+) ions in a solution. “pH” = the power of Hydrogen Litmus paper = measures the pH

What is the range on the pH scale for ACIDS?  Substances with a pH 6 and below.  Lower the number, stronger the acid.

What is the range on the pH scale for BASES?  Substances with a pH of 8 and above.  Higher the number, stronger the base.

What is a substance considered to be if it is neither an acid or a base?  pH around 7 (neutral)  Example: “pure water”

What is the difference between the numbers on the pH scale? There is a 10-fold difference.

What does the negative exponent indicate?  That the number is less than one.

 pH Scale  1x10 0 = 10 Battery Acid  1x10 –1 = 0.11 Stomach Acid  1x10 –2 = 0.012 Lemon Juice  1x10 –3 = 0.0013 Soda  1x10 –4 = 0.00014 Acid Rain  1x10 –5 = 0.000015 Black Coffee  1x10 –6 = 0.0000016 Urine/Saliva  1x10 –7 = 0.00000017 “Pure” Water  1x10 –8 = 0.000000018 Sea Water  1x10 –9 = 0.0000000019 Baking Soda  1x10 –10 = 0.000000000110 Great Salt Lake  1x10 –11 = 0.0000000000111 Ammonia  1x10 –12 = 0.00000000000112 Soapy Water  1x10 –13 = 0.000000000000113 Bleach  1x10 –14 = 0.00000000000001 14 Liquid Drano

Activity Draw the pH scale and label with examples !!!Go back to your drill and correct!!!

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