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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: avantgarde_ on April 18, 2005, 11:46:55 PM

Title: Spray paint, sucrose, respective intermolecular forces
Post by: avantgarde_ on April 18, 2005, 11:46:55 PM

Spray paint features pigments in a solvent. What intermolecular forces are present?

If sucrose molecules were submerged in a solution, what intermolecular forces would exist between them? Thanks  ;)

Title: Re:Spray paint, sucrose, respective intermolecular forces
Post by: charco on April 19, 2005, 08:47:43 AM

The intermolecular forces depend on both the solute and the solvent.
The solute may be :
1. non polar covalent
2. Covalent but with dipoles
3. ionic

The solvent may be:
1. Polar
2. Non-polar

This is rather simplified as there are subsets of solvents such as protic and aprotic.

There are three possible types of intermolecular force:
1. Van der Waals (induced dipole- dipole) forces
2. permanent dipole-dipole interactions
3. hydrogen bonding (a special case of 2. featuring hydrogen as the positive side of the dipole)


example:
Sucrose in water involves hydrogen bonding from the water to the -OH groups on the sucrose

'Pigments in a solvent' depends on both the nature of the pigment and the type of solvent