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Wednesday 27 January 2016

The pH of Common Substances

  By GK Planet Team       Wednesday 27 January 2016
In chemistrypH is a numeric scale used to specify the acidity or basicity (alkalinity) of an aqueous solution.
More precisely it is the negative of the logarithm to base 10 of the activity of the hydrogen ion.
The term pH refers to a mathematical system developed by Danish chemist Soren Sorenson (1868–1939) around 1909.
Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic.
Pure water is neutral, being neither an acid nor a base and its pH value is 7.
Human blood is slightly alkaline with pH 7.3-7.5
List of ph values different household substances/items
Substance
PH Value
Battery acid
1.0
Limes 
1.8-2.0
Lemon juice
2.2-2.4
Fruit jellies
2.8-3.4
Vinegar 
2.9
Apple juice
2.9-3.3
Strawberries
3.0-3.5
Orange juice
3.7
Tomatoes 
4.0-4.5
Bear  
4.5
Coffee  
5.0
Tea           
5.5
Rainwater         
5.6-6.0
Peas          
5.8-6.4
Urine  
6.0
Corn          
6.0-6.5
Butter 
6.1-6.4
Cow's milk
6.4
Maple syrup
6.5-7.0
Human saliva
6.5-7.5
Water 
7.0
Water 
7.0
Human blood
7.3-7.5
Sea water         
7.5-8.5 
Egg whites
7.6-8.0
Baking soda
8.3
Borax 
9.2
Milk of magnesia
10.5
Laundry ammonia
11.0
Lime water
12.0
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