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Add information about pH to Unit 1: Chemistry Part 2.md

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Daniel Chen 2019-10-18 14:56:51 +00:00 committed by James Su
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Grade 10/Science/SNC2DZ/Unit 1: Chemistry Part 2.md
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- Reacts with fats and oils to form soap - Reacts with fats and oils to form soap
- Bitter-tasting - Bitter-tasting
## pH
- Used as a scale to measure how acidic or basic a substance is
- Presented as a scale from 0-14
- The lower the pH the more acidic, the higher the pH the more basic
- Measures `concentration` of hydrogen ions in solution
- pH scale is logarithmic
- Concentration is increased tenfold when pH is increased by 1
- pH 1 = 0.1 mol/L
- pH 14 = 0.00000000000001 mol/L
- Water at 25 degrees Celsius is pH 7.0 (neither acidic nor basic)
## Chemical Change ## Chemical Change
- Similar to chemical reaction - Similar to chemical reaction