Question

Как изменяется растворимость спиртов в воде по мере увеличения Мr

Answer 1

Растворимость спиртов уменьшается по мере увеличения Mr

Answer 2

Changes in Solubility of Alcohols in Water with Increasing Mr

The solubility of alcohols in water can vary depending on the size and structure of the alcohol molecule. Generally, as the molecular weight (Mr) of the alcohol increases, its solubility in water tends to decrease. This is because larger alcohol molecules have more hydrophobic (water-repelling) regions, which makes it more difficult for them to dissolve in the polar solvent, water.

Alcohols with lower molecular weights, such as methanol (CH3OH) and ethanol (C2H5OH), are highly soluble in water. This is because they have smaller molecular sizes and can form hydrogen bonds with water molecules, which helps them dissolve easily. As the molecular weight increases, the solubility of alcohols in water decreases.

For example, propanol (C3H7OH) has a higher molecular weight than ethanol and is less soluble in water. Butanol (C4H9OH) is even less soluble, and as the molecular weight continues to increase, the solubility decreases further.

It's important to note that there are exceptions to this general trend. Some alcohols with larger molecular weights, such as glycerol (C3H8O3), can still be highly soluble in water due to their ability to form multiple hydrogen bonds with water molecules.

In summary, as the molecular weight (Mr) of alcohols increases, their solubility in water generally decreases. However, there are exceptions to this trend, and some larger alcohols can still be highly soluble in water due to their ability to form hydrogen bonds.