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<p>[QUOTE=&quot;NSP, post: 3108224, member: 74849&quot;]I believe the “like dissolves like” saying has more to do with the polarity of what you’re working with and not the actual chemical composition. Molecules’ structures can cause there to be regions in the molecule that have a slight negative charge and a slight positive charge. This imbalance (or lack thereof) causes a molecule to be polar (or not). The oxygen in acetone and the chlorine in PVC each have unpaired electrons, causing both of them to be somewhat polar. Evidently they’re of similar polarity since acetone is able to dissolve PVC. Something like hexane would be so much less polar than PVC that it couldn’t dissolve it. Likewise, something very polar like water would be too polar to dissolve PVC.[/QUOTE]</p><p><br /></p>

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