Sodium and fluorine are both small which are similar in size. This compound (NaF) in comparison to ZnCl2 is more ionic. When you look at Zn2+ and Cl-. Zn is more polarizable in comparison to Na because of shielding effects from the d block electrons. Cl is larger to F and therefore more polarized. So ZnCl2 has more covalent character. Reason for Insolubility for LiF. Large Uo (total lattice energy) favors insolubility. Large Uo (lattice energy) when r+/r- ~ 1. So when two atoms are of similar size, near one, it is insoluble. The general trend for radii increases right to left and down the periodic table. LiF is the least soluble alkali fluoride. Solubility for ZnCl2: Zn2+ and Cl- are varied in size. A rule to remember is that the more varied the size of the two ions, the more soluble it is. Also the more covalent the compound it is, the less soluble in comparison to ionic character of compounds. Solution Sodium and fluorine are both small which are similar in size. This compound (NaF) in comparison to ZnCl2 is more ionic. When you look at Zn2+ and Cl-. Zn is more polarizable in comparison to Na because of shielding effects from the d block electrons. Cl is larger to F and therefore more polarized. So ZnCl2 has more covalent character. Reason for Insolubility for LiF. Large Uo (total lattice energy) favors insolubility. Large Uo (lattice energy) when r+/r- ~ 1. So when two atoms are of similar size, near one, it is insoluble. The general trend for radii increases right to left and down the periodic table. LiF is the least soluble alkali fluoride. Solubility for ZnCl2: Zn2+ and Cl- are varied in size. A rule to remember is that the more varied the size of the two ions, the more soluble it is. Also the more covalent the compound it is, the less soluble in comparison to ionic character of compounds..

1. Sodium and fluorine are both small which are similar in size. This compound (NaF) in
comparison to ZnCl2 is more ionic.
When you look at Zn2+ and Cl-. Zn is more polarizable in comparison to Na because of
shielding effects from the d block electrons. Cl is larger to F and therefore more polarized. So
ZnCl2 has more covalent character.
Reason for Insolubility for LiF.
Large Uo (total lattice energy) favors insolubility. Large Uo (lattice energy) when
r+/r- ~ 1. So when two atoms are of similar size, near one, it is insoluble. The general trend for
radii increases right to left and down the periodic table.
LiF is the least soluble alkali fluoride.
Solubility for ZnCl2:
Zn2+ and Cl- are varied in size. A rule to remember is that the more varied the size of the two
ions, the more soluble it is. Also the more covalent the compound it is, the less soluble in
comparison to ionic character of compounds.
Solution
Sodium and fluorine are both small which are similar in size. This compound (NaF) in
comparison to ZnCl2 is more ionic.
When you look at Zn2+ and Cl-. Zn is more polarizable in comparison to Na because of
shielding effects from the d block electrons. Cl is larger to F and therefore more polarized. So
ZnCl2 has more covalent character.
Reason for Insolubility for LiF.
Large Uo (total lattice energy) favors insolubility. Large Uo (lattice energy) when
r+/r- ~ 1. So when two atoms are of similar size, near one, it is insoluble. The general trend for
radii increases right to left and down the periodic table.
LiF is the least soluble alkali fluoride.
Solubility for ZnCl2:
Zn2+ and Cl- are varied in size. A rule to remember is that the more varied the size of the two

2. ions, the more soluble it is. Also the more covalent the compound it is, the less soluble in
comparison to ionic character of compounds.