Why Does Cyclohexane Float on Water When Its Molecular Mass is Higher?

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In summary, cyclohexane floats on water because its mass density is lower. This is despite water having smaller molecules with less mass, as it has a greater density. The difference in density is due to hydrogen bonding. This topic was previously discussed in another forum post.
  • #1
markosheehan
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Why does cyclohexane float on water.? When I add up their relative molecular masses water has a lower value than cyclohexane?
 
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  • #2
markosheehan said:
Why does cyclohexane float on water.? When I add up their relative molecular masses water has a lower value than cyclohexane?

Floating occurs when the mass density is lower.
So even though water consists of smaller molecules with less mass (10 versus 84 g/mol), water still has a greater density.
What could the difference be?
For the record, this topic also came up in http://mathhelpboards.com/other-topics-22/ethanol-water-21217.html of yours.
 
  • #3
its to do with the hydrogen bonding .
thanks
 

Related to Why Does Cyclohexane Float on Water When Its Molecular Mass is Higher?

What is the difference between water and cyclohexane?

The main difference between water and cyclohexane is their molecular structures. Water is a polar molecule with a bent shape, while cyclohexane is a nonpolar molecule with a ring structure. Additionally, water has a higher boiling point and is a universal solvent, while cyclohexane has a lower boiling point and is not a good solvent for polar substances.

What are the physical properties of water and cyclohexane?

Water is a liquid at room temperature and has a density of 1 g/mL. It is also colorless, odorless, and tasteless. Cyclohexane is also a liquid at room temperature, with a density of 0.778 g/mL. It is also colorless, odorless, and has a mild sweet odor.

How do water and cyclohexane interact with each other?

Water and cyclohexane do not mix well due to their different polarities. They have weak interactions known as London dispersion forces, but they are not strong enough to overcome the strong hydrogen bonds in water. This results in the formation of distinct layers when the two substances are mixed.

What are the uses of water and cyclohexane?

Water is essential for life and has many uses such as hydration, cooking, and industrial processes. It is also used as a solvent in many chemical reactions. Cyclohexane is commonly used as a solvent for nonpolar substances, as well as a starting material in the production of nylon and other synthetic fibers.

Are water and cyclohexane safe to use?

Both water and cyclohexane are generally safe to use. However, it is important to handle cyclohexane with caution as it is flammable and can cause skin irritation. Water is safe for consumption, but it is important to monitor the quality of water sources to ensure it is free from harmful contaminants.

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