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===About Dissolving===
: When a [[solid]] is [[dissolve]]d it cannot be seen anymore because it has been broken down into pieces too small to see, even with a [[microscope]].
: The [[Particle Model]] can be used to explain the process of [[dissolving]].
{| class="wikitable"
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|[[File:DissolvingandDiffusing.png|center|500px]]
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| style="height:20px; width:200px; text-align:center;" |This [[particle]] [[diagram]] shows the [[particle]]s in a purple [[solid]] becoming separated from one another and spreading through the [[liquid]] from a high [[concentration]] to a low [[concentration]].
|}
: Not all [[solid]]s can [[dissolve]] in water. A [[solid]] which can be [[dissolve]]d easily in [[water]] is described as [[soluble]] but one that cannot be easily [[dissolve]]d in [[water]] is described as [[insoluble]].
: A solid that has [[dissolve]]d in a [[liquid]] is called a [[solute]] and the liquid is called a [[solvent]].