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Acid
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==Key Stage 3==
===Meaning===
An [[acid]] is a [[chemical]] ([[dissolve|dissolved]]) d in [[water]] that has a [[pH]] less than [[Neutral (Chemistry)|7]].
===About Acids===
: [[Acid]]s can be an [[Irritant]], [[Harmful]] or [[Corrosive]] and should be handled with care.
: When an [[acid]] is [[dissolve]]d in [[solution]] the [[Hydrogen]] [[atom]]s in the [[molecule]] become free to move around and these are what make it an [[acid]].
: [[Acid]]s can be [[concentrated]] or [[dilute]].
: [[Acid]]s can be [[weak]] or [[strong]] which depends on the type of [[acid]] and the [[concentration]].
: [[Acid]]s turn [[Litmus]] paper red.
: [[Acid]]s turn [[Universal Indicator]] pink, red, orange or yellow depending on the strength of the [[acid]].
Some common [[Acid]]s 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 Cell]]s.