Journal Entry:

How does Coulomb's Law apply to electrons and protons in an atom?  

Learning Intentions

• You will learn how ionic interactions with dipoles are important in the solubility of ionic compounds in polar solvents.

• You will learn that the equation for Coulomb's Law is proportional to the magnitude of the two charges and inversely proportional to the distance between the two particles.

• You will learn how to apply Coulombs law to explain solubility rules when ionic substances dissolve in water.

Closing Task:

You can draw a particle representation of water in a container, as well as when salt is dissolved in the water and when sugar is dissolved in the water.

Content Standards being covered:

Dipole forces result from the attraction among the positive end and negative ends of polar molecular. Hydrogen bonding is a strong type of dipole-dipole force that exists when very electronegative atoms (N, O, and F) are involved. (EK 2.B.2)

The atom is composed of negatively charged electrons, which can leave the atom, and a positively charge nucleus that is made of protons and neutrons. The attraction of the electrons to the nucleus is the basis of the structure of the atom. Coulomb's law is qualitatively useful for understanding the structure of the atom. (EK 1.B.1)

The solubility of a substance can be understood in terms of chemical equilibrium (EK 6.C.3)