TSV
pH Scale - TSV
The pH scale is a logarithmic measure of hydrogen ion concentration in aqueous solutions. Proposed in 1909 by Danish biochemist S.P.L. Sørensen, it is defined by the formula pH = -log₁₀[H⁺]. A pH of 7 is neutral, 0-6 is acidic, and 8-14 is alkaline (basic). It is widely used in chemistry, biology, agriculture, medicine, and environmental science. As a logarithmic scale where each pH unit represents a tenfold difference in hydrogen ion concentration, a change of 1 pH unit means the acidity or alkalinity changes by a factor of 10.
hydrogen ion concentration
acidity
alkalinity
basicity
chemistry
aqueous solution
logarithmic scale
code slug name description classification examples phValue
0 ph-0-strongly-acidic pH 0 (Strongly Acidic) The most strongly acidic pH value. Strongly Acidic [{"name":"Hydrochloric Acid (1M)","ph":"0.0"},{"name":"Battery Acid","ph":"0.0-1.0"}] 0
1 ph-1-gastric-acid pH 1 (Gastric Acid) The pH value of human gastric acid. Strongly Acidic [{"name":"Gastric Acid","ph":"1.0-2.0"}] 1
2 ph-2-lemon-juice pH 2 (Lemon Juice) The pH value of citrus fruits like lemon juice. Acidic [{"name":"Lemon Juice","ph":"2.0-2.3"},{"name":"Vinegar","ph":"2.4-3.0"}] 2
3 ph-3-orange-juice pH 3 (Orange Juice) The pH value of orange juice and soft drinks. Acidic [{"name":"Orange Juice","ph":"3.0-4.0"},{"name":"Soft Drinks","ph":"2.5-3.5"}] 3
4 ph-4-tomato pH 4 (Tomato) The pH value of tomatoes and beer. Weakly Acidic [{"name":"Tomato","ph":"4.0-4.6"},{"name":"Beer","ph":"4.0-5.0"}] 4
5 ph-5-coffee pH 5 (Coffee) The pH value of black coffee and rainwater. Weakly Acidic [{"name":"Black Coffee","ph":"5.0"},{"name":"Rainwater","ph":"5.0-5.5"}] 5
6 ph-6-milk pH 6 (Milk) The pH value of milk and saliva. Weakly Acidic [{"name":"Milk","ph":"6.5-6.8"},{"name":"Saliva","ph":"6.2-7.4"}] 6
7 ph-7-neutral pH 7 (Neutral) The pH of pure water, the boundary between acidic and alkaline. Neutral [{"name":"Pure Water","ph":"7.0"}] 7
8 ph-8-seawater pH 8 (Seawater) The pH value of seawater. Weakly Alkaline [{"name":"Seawater","ph":"8.0-8.5"}] 8
9 ph-9-baking-soda pH 9 (Baking Soda) The pH value of baking soda (sodium bicarbonate). Weakly Alkaline [{"name":"Baking Soda","ph":"8.3-9.0"}] 9
10 ph-10-soap pH 10 (Soap) The pH value of soap and borax. Alkaline [{"name":"Soap","ph":"9.0-10.0"},{"name":"Borax","ph":"9.0-10.0"}] 10
11 ph-11-ammonia pH 11 (Ammonia) The pH value of ammonia solution. Alkaline [{"name":"Ammonia Solution","ph":"11.0"}] 11
12 ph-12-bleach pH 12 (Bleach) The pH value of household bleach. Strongly Alkaline [{"name":"Bleach","ph":"12.0-13.0"}] 12
13 ph-13-lye pH 13 (Sodium Hydroxide) The pH value of sodium hydroxide (lye/caustic soda). Strongly Alkaline [{"name":"Sodium Hydroxide (Lye)","ph":"13.0-14.0"}] 13
14 ph-14-strongly-alkaline pH 14 (Most Strongly Alkaline) The most strongly alkaline pH value. Strongly Alkaline [{"name":"Sodium Hydroxide (1M)","ph":"14.0"}] 14