Difference between revisions of "Acid"
(→Examples) |
|||
Line 2: | Line 2: | ||
===Meaning=== | ===Meaning=== | ||
An [[acid]] is a [[chemical]] [[dissolve]]d in [[water]] that has a [[pH]] less than [[Neutral (Chemistry)|7]]. | An [[acid]] is a [[chemical]] [[dissolve]]d in [[water]] that has a [[pH]] less than [[Neutral (Chemistry)|7]]. | ||
+ | |||
+ | : [[Noun]]: '''Acid''' | ||
+ | : [[Verb]]: '''To acidify''' | ||
+ | : [[Adjective]]: '''Acidic''' | ||
===About Acids=== | ===About Acids=== |
Revision as of 17:16, 28 September 2018
Key Stage 3
Meaning
An acid is a chemical dissolved in water that has a pH less than 7.
About Acids
- Acids can be an Irritant, Harmful or Corrosive and should be handled with care.
- When an acid is dissolved in solution the Hydrogen atoms in the molecule become free to move around and these are what make it an acid.
- Acids can be concentrated or dilute.
- Acids can be weak or strong which depends on the type of acid and the concentration.
- Acids turn Litmus paper red.
- Acids turn Universal Indicator pink, red, orange or yellow depending on the strength of the acid.
Some common Acids you should know:
- Hydrochloric Acid - Found in the stomach.
- Citric Acid - Found in Citrus fruits.
- Ethanoic Acid - The common name for vinegar.
- Sulphuric Acid - Found in Electrical Cells.
Examples
Car batteries contain Sulphuric Acid at around pH 0. | Citrus fruits have Citric Acid in them at around pH 2. | Vinegar is made of Ethanoic Acid at around pH 2.5. |
Fizzy drinks contain Carbonic Acid at around pH 3. | Coffee is slightly acidic at pH 5. | Milk has a small amount of Lactic Acid giving it pH 6.5. |