The correct order of the solubility of alkaline earth metal...

The correct order of the solubility of alkaline earth metal chlorides in water is (a) $\mathrm{BaCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}>\mathrm{BeCl}_{2}>\mathrm{SrCl}_{2}$ (b) $\mathrm{BeCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{SrCl}_{2}^{2}>\mathrm{BaCl}_{2}$ (c) $\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{BeCl}_{2}^{2}>\mathrm{BaCl}_{2}>\mathrm{SrCl}_{2}^{2}$ (d) $\mathrm{BaCl}_{2}^{2}>\mathrm{SrCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{MgCl}_{2}>\mathrm{BeCl}_{2}^{2}$

The correct order of the solubility of alkaline earth metal chlorides in water is
(a) $\mathrm{BaCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}>\mathrm{BeCl}_{2}>\mathrm{SrCl}_{2}$
(b) $\mathrm{BeCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{SrCl}_{2}^{2}>\mathrm{BaCl}_{2}$
(c) $\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{BeCl}_{2}^{2}>\mathrm{BaCl}_{2}>\mathrm{SrCl}_{2}^{2}$
(d) $\mathrm{BaCl}_{2}^{2}>\mathrm{SrCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{MgCl}_{2}>\mathrm{BeCl}_{2}^{2}$

Key Concepts

Periodic Trends in Alkaline Earth Metals

The alkaline earth metals display periodic trends such as changes in ionic size and charge density down the group. As you go down the group, the ionic radius increases, which influences lattice energies and hydration energies, ultimately affecting the solubility of their corresponding compounds.

Ionic Radii and Charge Density

Ionic radii and charge density are key factors in determining the strength of ionic bonds. Smaller ions with higher charge density typically have stronger ionic bonds, which can result in higher lattice energies and lower solubility. Conversely, larger ions have lower charge density, which can reduce lattice energy and affect solubility trends.

Ionic Solubility

Ionic solubility refers to the process in which ionic compounds dissolve in a solvent, usually water. The effectiveness of dissolution is determined by the balance between the lattice energy of the solid and the hydration energy provided by the solvent molecules. Understanding this balance explains why some ionic compounds are more soluble than others.

Lattice Energy and Hydration Energy

Lattice energy is the energy required to separate the ions in an ionic solid, while hydration energy is the energy released when ions interact with water molecules. A compound dissolves when the hydration energy compensates for or exceeds the lattice energy. This interplay is crucial in predicting the solubility of ionic compounds.

Please give Ace some feedback