pH

pH P010

  • A measure of the acidity or the alkalinity of a fluid. The scale ranges from 0 (acid) to 14 (alkali) with 7 considered neutral.
  • The definitions of weak and strong acids, and weak and strong bases do not refer to pH, but instead describe whether an acid or base ionizes in solution.
  • Finding good sealing materials can be difficult on both ends of the pH scale.
  • Be aware that these numbers are exponents to the base 10. This means that a pH of 8 is ten times more alkali than a pH of 7.
  • Here are som common pH values

 

ACID

SOLUTION

pH

Acetic

N

2.4

Acetic

0.1N

2.9

Acetic

0.01N

3.4

Alum

0.1N

3.2

Arsenious

saturated

5.0

Benzoic

0.01N

3.1

Boric

0.1N

5.2

Carbonic

saturated

3.8

Citric

0.1N

2.2

Formic

0.1N

2.3

Hydrochloric

N

0.1

Hydrochloric

0.1N

1.1

Hydrochloric

0.01N

2.0

Hydrocyanic

0.1N

5.1

Hydrogen sulfide

0.1N

4.1

Lactic

0.1N

2.4

Malic

0.1N

2.2

Orthophosphoric

0.1N

1.5

Oxalic

0.1N

1.6

Sulfuric

N

0.3

Sulfuric

0.1N

1.2

Sulfuric

0.01N

2.1

Sulfurous

0.1N

1.5

Tartaric

0.1N

2.2

BASES

SOLUTION

pH

Ammonia

N

11.5

Ammonia

0.1N

11.1

Ammonia

0.01N

10.6

Borax

0.1N

9.2

Calcium carbonate

saturated

9.4

Ferrous hydroxide

saturated

9.5

Lime

saturated

12.4

Magnesia

saturated

10.5

Potassium

0.01N

11.0

Potassium hydroxide

N

14.0

Potassium hydroxide

0.1N

13.0

Potassium hydroxide

0.01N

12.0

Sodium bicarbonate

0.1N

8.4

Sodium carbonate

0.1N

11.6

Sodium hydroxide

N

14.0

Sodium hydroxide

0.1N

13.0

Sodium hydroxide

0.01N

12.0

Sodium metasilicate

0.1N

12.6

Sodium sesquicarbonate

0.1N

10.1

Trisodium phosphate

0.1N

12.0

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Posted

  • On February 16, 2018