YAML

pH Scale - YAML

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: "0"
  slug: "ph-0-strongly-acidic"
  name: "pH 0 (Strongly Acidic)"
  description: "The most strongly acidic pH value."
  phValue: 0
  classification: "Strongly Acidic"
  examples:
    - name: "Hydrochloric Acid (1M)"
      ph: "0.0"
    - name: "Battery Acid"
      ph: "0.0-1.0"
- code: "1"
  slug: "ph-1-gastric-acid"
  name: "pH 1 (Gastric Acid)"
  description: "The pH value of human gastric acid."
  phValue: 1
  classification: "Strongly Acidic"
  examples:
    - name: "Gastric Acid"
      ph: "1.0-2.0"
- code: "2"
  slug: "ph-2-lemon-juice"
  name: "pH 2 (Lemon Juice)"
  description: "The pH value of citrus fruits like lemon juice."
  phValue: 2
  classification: "Acidic"
  examples:
    - name: "Lemon Juice"
      ph: "2.0-2.3"
    - name: "Vinegar"
      ph: "2.4-3.0"
- code: "3"
  slug: "ph-3-orange-juice"
  name: "pH 3 (Orange Juice)"
  description: "The pH value of orange juice and soft drinks."
  phValue: 3
  classification: "Acidic"
  examples:
    - name: "Orange Juice"
      ph: "3.0-4.0"
    - name: "Soft Drinks"
      ph: "2.5-3.5"
- code: "4"
  slug: "ph-4-tomato"
  name: "pH 4 (Tomato)"
  description: "The pH value of tomatoes and beer."
  phValue: 4
  classification: "Weakly Acidic"
  examples:
    - name: "Tomato"
      ph: "4.0-4.6"
    - name: "Beer"
      ph: "4.0-5.0"
- code: "5"
  slug: "ph-5-coffee"
  name: "pH 5 (Coffee)"
  description: "The pH value of black coffee and rainwater."
  phValue: 5
  classification: "Weakly Acidic"
  examples:
    - name: "Black Coffee"
      ph: "5.0"
    - name: "Rainwater"
      ph: "5.0-5.5"
- code: "6"
  slug: "ph-6-milk"
  name: "pH 6 (Milk)"
  description: "The pH value of milk and saliva."
  phValue: 6
  classification: "Weakly Acidic"
  examples:
    - name: "Milk"
      ph: "6.5-6.8"
    - name: "Saliva"
      ph: "6.2-7.4"
- code: "7"
  slug: "ph-7-neutral"
  name: "pH 7 (Neutral)"
  description: "The pH of pure water, the boundary between acidic and alkaline."
  phValue: 7
  classification: "Neutral"
  examples:
    - name: "Pure Water"
      ph: "7.0"
- code: "8"
  slug: "ph-8-seawater"
  name: "pH 8 (Seawater)"
  description: "The pH value of seawater."
  phValue: 8
  classification: "Weakly Alkaline"
  examples:
    - name: "Seawater"
      ph: "8.0-8.5"
- code: "9"
  slug: "ph-9-baking-soda"
  name: "pH 9 (Baking Soda)"
  description: "The pH value of baking soda (sodium bicarbonate)."
  phValue: 9
  classification: "Weakly Alkaline"
  examples:
    - name: "Baking Soda"
      ph: "8.3-9.0"
- code: "10"
  slug: "ph-10-soap"
  name: "pH 10 (Soap)"
  description: "The pH value of soap and borax."
  phValue: 10
  classification: "Alkaline"
  examples:
    - name: "Soap"
      ph: "9.0-10.0"
    - name: "Borax"
      ph: "9.0-10.0"
- code: "11"
  slug: "ph-11-ammonia"
  name: "pH 11 (Ammonia)"
  description: "The pH value of ammonia solution."
  phValue: 11
  classification: "Alkaline"
  examples:
    - name: "Ammonia Solution"
      ph: "11.0"
- code: "12"
  slug: "ph-12-bleach"
  name: "pH 12 (Bleach)"
  description: "The pH value of household bleach."
  phValue: 12
  classification: "Strongly Alkaline"
  examples:
    - name: "Bleach"
      ph: "12.0-13.0"
- code: "13"
  slug: "ph-13-lye"
  name: "pH 13 (Sodium Hydroxide)"
  description: "The pH value of sodium hydroxide (lye/caustic soda)."
  phValue: 13
  classification: "Strongly Alkaline"
  examples:
    - name: "Sodium Hydroxide (Lye)"
      ph: "13.0-14.0"
- code: "14"
  slug: "ph-14-strongly-alkaline"
  name: "pH 14 (Most Strongly Alkaline)"
  description: "The most strongly alkaline pH value."
  phValue: 14
  classification: "Strongly Alkaline"
  examples:
    - name: "Sodium Hydroxide (1M)"
      ph: "14.0"