Mercury
Mercury
Mercury
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2) the relative position of hydrophilic<br />
groups<br />
• A molecule has stronger wettability when its<br />
hydrophilic groups are located in the middle rather<br />
than at the end of the chain, like the following<br />
molecule, a famous penetrant:<br />
• A molecule has better dirt removing power when its<br />
hydrophilic groups are located at the end rather<br />
than in the middle of the chain, e.g.:<br />
• C 16 H 33 OCOCH 2 CH(SO 3 Na)COOH has better dirt<br />
removing power
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