Heartburn?
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PH
description
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 - PowerPoint PPT Presentation
Transcript of 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 Acids have a pH less than 7 Bases have a pH higher
than 7 Neutral pH is 7
Acids and Bases are actually related.Weak acid = Strong baseStrong acid = Weak base
Strong battery acid(sulphuric acid)
pH 0
pH 1
pH 2
pH 3
pH 4
Black coffee
pH 5
Urine
pH 6
Distilled water
pH 7
seawater
pH 8
Baking soda
pH 9
Milk of magnesia(Magensium hydroxide)
pH 10
Ammonia solution
pH 11
Soapy water
pH 12
Oven cleaner
pH 13
Drain cleaner
pH 14
Weak & StrongpH 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.
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pH IndicatorspH indicators are chemical compounds which change colour depending on the concentration of H+
Examples: Litmus Thymol blue Phenolphthalene Bromothymol blue Methyl Orange
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
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