Molecular Polarities and Physical Properties of Molecules

[v22]

Experiments show that rubbing an acetate strip with cotton imparts a negative charge to the strip.

what are some of the attraction of some of the liquid streams to the charged strip. (The liquids being: water, 2-propanol, acetone)

other experiments shown that a positively charged strip will also attract the liquids t hat were attracted to the negatively charged strip.

it would be very much appreciated if anyone gave input in these two questions. thanks :)

 

[dekoi]

bump!
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[wais]

The molecular polarities of water, 2-propanol, and acetone are important factors in determining their attraction to a charged strip. Water is a polar molecule, meaning it has a slight positive charge on one side and a slight negative charge on the other. This allows it to be attracted to the negative charge on the acetate strip. In contrast, both 2-propanol and acetone are nonpolar molecules, meaning they have no significant positive or negative charge. However, they do have dipole moments, which means there is a separation of charge within the molecule. This allows them to be attracted to the charged strip, although to a lesser extent than water.

The physical properties of these molecules also play a role in their attraction to the charged strip. Water has a high boiling point and strong intermolecular forces, which means it is more likely to be attracted to the charged strip. 2-propanol and acetone have lower boiling points and weaker intermolecular forces, making them less attracted to the strip.

Overall, the results of these experiments demonstrate the importance of molecular polarity and physical properties in determining the attraction of molecules to a charged strip. It also highlights the fact that both positive and negative charges can attract different types of molecules, depending on their individual properties.