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Heartburn?

pH. Heartburn?. Heartburn occurs when the acid from our stomach travels back up our oesophagus. It’s also known as Acid Reflux. pH. The strength of an acid or base is measured using a scale called pH. pH stands for ‘power of Hydrogen’ pH scale ranges from 0-14

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Heartburn?

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  1. pH

  2. Heartburn? Heartburn occurs when the acid from our stomach travels back up our oesophagus. It’s also known as Acid Reflux

  3. pH The strength of an acid or base is measured using a scale called pH. pH stands for ‘power of Hydrogen’ • pH scale ranges from 0-14 • Acids have a pH less than 7 • Bases have a pH higher than 7 • Neutral pH is 7

  4. Acids and Bases are actually related. Weak acid = Strong base Strong acid = Weak base

  5. Strong battery acid(sulphuric acid) pH 0

  6. pH 1

  7. pH 2

  8. pH 3

  9. pH 4

  10. pH 5 Black coffee

  11. pH 6 Urine

  12. pH 7 Distilled water

  13. pH 8 seawater

  14. pH 9 Baking soda

  15. pH 10 Milk of magnesia (Magensium hydroxide)

  16. pH 11 Ammonia solution

  17. pH 12 Soapy water

  18. pH 13 Oven cleaner

  19. pH 14 Drain cleaner

  20. Weak & Strong pH Measures the concentration of H+ available in water. The higher the concentration, the more acidic the solution is. The scale is exponential. pH 7 has a 1 to 1 ratio of H+: OH- pH 6 = 10x concentration of pH 7. pH 5 = 10x concentration of pH6. 1

  21. pH Indicators pH indicators are chemical compounds which change colour depending on the concentration of H+ Examples: • Litmus • Thymol blue • Phenolphthalene • Bromothymol blue • Methyl Orange

  22. Why measure pH? We use pH indicators to measure a variety of things: • pH of Swimming pools • Waterways and environment • pH in the garden, soil. • Stomach conditions, skin, hair and mouth

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