ph. heartburn? heartburn occurs when the acid from our stomach travels back up our oesophagus....
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PH
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Heartburn?
Heartburn occurs when the acid from our stomach travels back up our oesophagus. It’s also known as Acid Reflux
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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
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Acids and Bases are actually related.Weak acid = Strong baseStrong acid = Weak base
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Strong battery acid(sulphuric acid)
pH 0
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pH 1
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pH 2
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pH 3
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pH 4
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Black coffee
pH 5
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Urine
pH 6
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Distilled water
pH 7
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seawater
pH 8
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Baking soda
pH 9
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Milk of magnesia(Magensium hydroxide)
pH 10
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Ammonia solution
pH 11
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Soapy water
pH 12
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Oven cleaner
pH 13
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Drain cleaner
pH 14
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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
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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
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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