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Published byAllison Bastow Modified over 2 years ago

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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 notation.

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

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

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

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

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

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

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pH Scale 1x10 0 = 10 Battery Acid 1x10 –1 = 0.11 Stomach Acid 1x10 –2 = Lemon Juice 1x10 –3 = Soda 1x10 –4 = Acid Rain 1x10 –5 = Black Coffee 1x10 –6 = Urine/Saliva 1x10 –7 = “Pure” Water 1x10 –8 = Sea Water 1x10 –9 = Baking Soda 1x10 –10 = Great Salt Lake 1x10 –11 = Ammonia 1x10 –12 = Soapy Water 1x10 –13 = Bleach 1x10 –14 = Liquid Drano

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

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