Do organic solvents dissolve organic solutes in molecular form or in ionic form?
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I would like to ask: when dichloromethane dissolves polyethylene glycol 8000, does this dissolution process occur through molecular diffusion or ion diffusion? Will there be chloride ions in the middle? Why? When is the process of dissolution a physical process? When is it a chemical process? When does it exist as a molecule? When is it present as ions?
The degree of ionization of organic substances in dichloromethane is approximately zero; no chloride ions are released as a result of ionization. The degree of ionization of ethylene glycol is also approximately zero, and it exists in the dichloromethane in a molecular form. Of course, there may be some liquid structure present. Generally speaking, if no new substances are formed, it is considered physical mixing. This post was last edited by Albertlu on 2009-1-11 at 16:42
When an organic solvent reacts with a substance that is being dissolved, it is a chemical process, and ions are involved； When no chemical reaction occurs, it is a physical process, with molecules present. If it is extraction, then it must be a physical process.
Between organic substances (such as methanol and ethanol), it is generally a physical process, that is, molecular diffusion; between organic and inorganic substances, as well as between inorganic substances (water, sodium chloride), it is generally ion diffusion, with the exception of gases