Difference between revisions of "Acid"
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|[[File:Vinegar.png|center|200px]] | |[[File:Vinegar.png|center|200px]] | ||
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| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |Car [[Battery|batteries]] contain [[Sulphuric Acid]] at around [[pH]] 0. |
| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |[[Citrus]] [[fruit]]s have [[Citric Acid]] in them at around [[pH]] 2. |
| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |[[Vinegar]] is made of [[Ethanoic Acid]] at around [[pH]] 2.5. |
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|[[File:Cola.png|center|200px]] | |[[File:Cola.png|center|200px]] | ||
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|[[File:Milk.png|center|200px]] | |[[File:Milk.png|center|200px]] | ||
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| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |Fizzy drinks contain [[Carbonic Acid]] at around [[pH]] 3. |
| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |Coffee is slightly [[Acid|acidic]] at [[pH]] 5. |
| − | | style="height:20px; width:200px; text-align:center;" | | + | | style="height:20px; width:200px; text-align:center;" |Milk has a small amount of [[Lactic Acid]] giving it [[pH]] 6.5. |
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Revision as of 17:15, 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
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| 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. |
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| 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. |