Intermolecular Forces Effect on Candy Dissolution
Disciplines
Analytical Chemistry | Physical Chemistry
Abstract (300 words maximum)
Intermolecular forces are interactions that influence the attraction between molecules. The four main intermolecular forces are London dispersion forces, dipole-dipole interactions, hydrogen bonding, and ion-dipole interactions. Several concentrations of different solutes in water were used to dissolve Halls cough drops. The rate of dissolution is reflected in the intermolecular forces between the solution and the Halls cough drop. With increased concentrations of salt, dissolution rate decreased over time. Similarly, with increased concentration of ethanol, dissolution rate decreased over time. As expected, increased agitation increased the interaction with the cough drop and increased the potential for the intermolecular forces to dissolve the cough drop. As salt concentration is increased, more water surrounds the salt ions and is less available to dissolve the Halls cough drop. Ethanol adds a nonpolar component that hinders dissolution of the Halls cough drop with increase in concentration. Activation energies were calculated based on studying these dissolutions at different temperatures.
Academic department under which the project should be listed
Department of Chemistry and Biochemistry
Primary Investigator (PI) Name
Dr. Marina Koether
Intermolecular Forces Effect on Candy Dissolution
Intermolecular forces are interactions that influence the attraction between molecules. The four main intermolecular forces are London dispersion forces, dipole-dipole interactions, hydrogen bonding, and ion-dipole interactions. Several concentrations of different solutes in water were used to dissolve Halls cough drops. The rate of dissolution is reflected in the intermolecular forces between the solution and the Halls cough drop. With increased concentrations of salt, dissolution rate decreased over time. Similarly, with increased concentration of ethanol, dissolution rate decreased over time. As expected, increased agitation increased the interaction with the cough drop and increased the potential for the intermolecular forces to dissolve the cough drop. As salt concentration is increased, more water surrounds the salt ions and is less available to dissolve the Halls cough drop. Ethanol adds a nonpolar component that hinders dissolution of the Halls cough drop with increase in concentration. Activation energies were calculated based on studying these dissolutions at different temperatures.