How does the solubility of formaldehyde change with temperature?

2017-08-02View Original

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How does the solubility of formaldehyde change with temperature?

Reply #22017-08-02

Formaldehyde has a high solubility because the oxygen in its carbonyl group carries a significant negative charge, allowing it to form hydrogen bonds. Although CO also has a carbonyl group, there is also a coordinate bond between carbon and oxygen, with oxygen providing the electrons for this bond. As a result, both the oxygen and carbon atoms carry little charge, the molecule’s polarity is very low, and hydrogen bonds cannot be formed; hence, its solubility is low

Reply #32018-07-16

The solubility of formaldehyde in water increases as the temperature decreases, but it tends to polymerize below 10°C; therefore, the absorption temperature of formaldehyde in production should not be set too low.

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