pH scale Table and examples

by wilben, Last Updated: 2020-03-28

In everyday life, perhaps this has already happened. For example, the acidity of water is too high, about 4 units: at this pH, 1 million times more H + ions than OH– ions are. Obviously, you need to add a lot of alkalies before the pH starts to rise. But when the pH reaches 6 units, then the H + ions will be only 100 times larger, but a small amount of alkali will last for a long time! Therefore, often when adjusting the pH beginners cross the desired line.

ph scale and examples

The closer you get to 7, the less acid or alkali you need to adjust the pH, and you need few H + or OH- ions to have an effect. At pH 5, you need to add much more ions to change the pH. This is one of the reasons (among many others) why the pH in the nutrient solution needs to be kept at a low level.

Table: pH scale, examples

Н+ рН ОН Example
1×10° 0 1х10-14 battery acid
1×10-1 1 1х10-13 sulphuric acid
1×10-2 2 1х10-12 lemon juice vinegar
1×10-3 3 1×1011 orange juice, red wine
1х104 4 1х11-10 tomato juice
1х105 5 1х109 coffee, banana
1х106 6 1х108 milk, urine
1х107 7 1х107 fresh water
1х108 8 1х106 sea water
1х109 9 1х105 baking soda
1х11-10 10 1х104 magnesia emulsion solution
1×1011 11 1х10-3 ammonia solution
1х10-12 12 1х10-2 soapy water
1х10-13 13 1х10-1 bleach (NaClO solution)
1х10-14 14 1×10° caustic liquor (NaOH solution)

Table1: pH scale, examples

Magnitude рН Concentration Н+ relatively neutral water Example
0 10 000 000 battery acid
1 1000 000 sulphuric acid
2 100 000 lemon juice vinegar
3 10 000 orange juice, soda
4 1000 tomato juice, acid rain
5 100 black coffee, bananas
6 10 urine, milk
7 1 fresh water
8 0.1 sea water, eggs
9 0.01 baking soda
10 0.001 Great Salt Lake, magnesia emulsion
11 0.0001 ammonia solution
12 0.000 01 soapy water
13 0.000 001 bleach, oven cleaners
14 0.000 0001 pipe clogging liquid

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