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Chemistry
Solubility depends on polarity or on the number of hydrogen bonds?
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[QUOTE="pisluca99, post: 6829468, member: 730550"] Nice One! therefore, simply, a molecule is more soluble in water if it forms a greater number of stronger interactions with it (hydrogen bonds and dipole-dipole interactions). In the case of butanol, the carbon chain is longer, so that only a small portion of the molecule can interact with stronger interactions (compared to, for example, methanol), while most of the molecule interacts with water through dipole-induced dipole interactions, which are very weak and 'instantaneous', so much so that water molecules prefer, more than anything else, to interact with each other. Therefore, moment by moment, butanol is 'surrounded' by a reduced number of water molecules, proportionally, compared to what happens in alcohols with shorter chains. This reduces solubility. The effect increases as the number of carbon atoms increases. or, more simply, as the size of the alkyl chain increases, the amount of dipole-induced dipole interactions between alcohol and water increases proportionally, which are weaker than the hydrogen bonds formed between alcohol and water. Consequently, there is, proportionally, a greater quantity of weaker interactions, with consequent lower solubility, because the weaker interactions lead to a more unstable system. I hope I caught what you meant. [/QUOTE]
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Solubility depends on polarity or on the number of hydrogen bonds?
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