Why alkyl halides dont dissolve in water?

In summary, alkyl halides have low solubility in water due to their non-polar nature, which makes it difficult for them to interact with the polar solvent. Hydrogen bonding also plays a role in this low solubility. These molecules can dissolve in other non-polar solvents, such as alcohols and hydrocarbons. The size of the alkyl group affects the solubility, with larger groups resulting in lower solubility. Despite their low solubility in water, alkyl halides have various uses in industries such as pharmaceuticals, agriculture, and manufacturing.
  • #1
nil1996
301
7
In water ,due to attraction between water molecules and polar solute molecules the solute dissolves.
But though alkyl halides are polar they are less soluble in water.Why?
 
Last edited:
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  • #2
i got it.
I think there aren't many chemists on PF:(
 

1. Why do alkyl halides have low solubility in water?

Alkyl halides have low solubility in water because they are non-polar molecules. Water is a polar solvent, meaning it has a slightly positive end and a slightly negative end. Alkyl halides, on the other hand, are non-polar molecules with a neutral charge. This difference in polarity makes it difficult for them to dissolve in water.

2. What is the role of hydrogen bonding in the solubility of alkyl halides in water?

Hydrogen bonding is an important factor in the solubility of alkyl halides in water. Water molecules are able to form hydrogen bonds with each other, creating a network of molecules that hold onto each other. Alkyl halides, however, cannot form hydrogen bonds with water molecules, making it difficult for them to break apart and dissolve in water.

3. Can alkyl halides dissolve in other solvents besides water?

Yes, alkyl halides can dissolve in other solvents besides water. Some examples of solvents that are able to dissolve alkyl halides include alcohols, ethers, and hydrocarbons. These solvents are also non-polar in nature, similar to alkyl halides, allowing them to interact and dissolve with each other.

4. How does the size of the alkyl group affect the solubility of alkyl halides in water?

The size of the alkyl group can greatly affect the solubility of alkyl halides in water. Generally, the larger the alkyl group, the lower the solubility in water. This is because larger alkyl groups have more non-polar bonds, making the molecule even less soluble in the polar solvent of water.

5. What are some possible uses for alkyl halides that do not dissolve in water?

Alkyl halides that do not dissolve in water have a variety of uses in industries such as pharmaceuticals, agriculture, and manufacturing. They can be used as solvents for reactions that require non-polar conditions, as well as in the production of plastics, pesticides, and other chemicals. They can also be used as refrigerants and propellants in aerosols.

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