查看完整版本 : why high molecular mass of RCOOH water-insoluble??

chomool 2013-4-18 07:34 PM

why high molecular mass of RCOOH water-insoluble??

why high molecular mass of RCOOH water-insoluble??

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chungkin81 2013-4-18 08:12 PM

Only carboxylic acids with small number of carbon in the chains are soluble in water.

However, due to the long carbon chains that are made up of C and H, they are insoluble in water. The proportion of the water soluble group (-COOH) becomes insignificant.

Thus, high molecular masses of RCOOH are insoluble in water.

Zzlaz 2013-4-18 08:44 PM

increasing the hydrophobic chain length increases the attraction among molecules(van der Waals' forces) , and at the same time difficult to separate them due to low attractive forces between water and the hydrophobic tail... the hydrophilic nature of -COOH is no longer dominant.
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查看完整版本: why high molecular mass of RCOOH water-insoluble??