Separated ede Molecules Energy is released Adding energy is necessary to separate molecules when separated molecules dissolve. 2. Figure 9.3 shows an energy diagram for the dissolving of an ionic compound. Discuss what factors are going to tend to make this process more favorable-in other words would likely make the com- pound more soluble. Step 1 Step 2 Solution Solid or Liquid Net Energy Change > 0 dissolving You Feel the Net Change FIGURE 9.3 Energy Diagram for the Dissolving of an lonic Compound Schmeisser. 1: Eisen, L.\"Inquiry-based activities for generalchemistry Partl-Solubility Modified from Marano N Solution Factors Influencing the Formation of Ionic Bond : 1. Ionization energy It is defined as the amount of energy required to remove the most loosely bound electron from an isolated gaseous atom of an element. The lesser the ionization energy, the greater is the ease of the formation of a cation. 2. Electron affinity It is defined as the amount of energy released when an electron is added to an isolated gaseous atom of an element. The higher the energy released during this process, the easier will be the formation of an anion. Thus, low ionization energy of a metal atom and high electron affinity of a non-metal atom facilitate the formation of an ionic bond between them. 3. Lattice energy It is defined as the amount of energy released when cations and anions are brought from infinity to their respective equilibrium sites in the crystal lattice to form one mole of the ionic compound. The higher the lattice energy, the greater is the tendency of the formation of an ionic bond. The higher the charges on the ions and smaller the distance between them, the greater is the force of attraction between them. .

1. Separated ede Molecules Energy is released Adding energy is necessary to separate molecules
when separated molecules dissolve. 2. Figure 9.3 shows an energy diagram for the dissolving of
an ionic compound. Discuss what factors are going to tend to make this process more favorable-
in other words would likely make the com- pound more soluble. Step 1 Step 2 Solution Solid or
Liquid Net Energy Change > 0 dissolving You Feel the Net Change FIGURE 9.3 Energy
Diagram for the Dissolving of an lonic Compound Schmeisser. 1: Eisen, L."Inquiry-based
activities for generalchemistry Partl-Solubility Modified from Marano N
Solution
Factors Influencing the Formation of Ionic Bond :
1. Ionization energy
It is defined as the amount of energy required to remove the most loosely bound electron from an
isolated gaseous atom of an element. The lesser the ionization energy, the greater is the ease of
the formation of a cation.
2. Electron affinity
It is defined as the amount of energy released when an electron is added to an isolated gaseous
atom of an element. The higher the energy released during this process, the easier will be the
formation of an anion.
Thus, low ionization energy of a metal atom and high electron affinity of a non-metal atom
facilitate the formation of an ionic bond between them.
3. Lattice energy
It is defined as the amount of energy released when cations and anions are brought from infinity
to their respective equilibrium sites in the crystal lattice to form one mole of the ionic compound.
The higher the lattice energy, the greater is the tendency of the formation of an ionic bond. The
higher the charges on the ions and smaller the distance between them, the greater is the force of
attraction between them.