Question

list the following bonds in order of increasing ionic character: the barium - sulfur bond in bas, the lithium - fluorine bond in lif, the chlorine - fluorine bond in clf₃, the hydrogen - sulfur bond in h₂s. select < select < select < select li - f h - s cl - f ba - s

Explanation:

Step1: Recall ionic - character concept

The ionic character of a bond is determined by the electronegativity difference ($\Delta\chi$) between the two atoms in the bond. The greater the electronegativity difference, the greater the ionic character.

Step2: Find electronegativity values

The electronegativity values from the Pauling scale are: $\chi_H = 2.1$, $\chi_S=2.5$, $\chi_{Cl}=3.0$, $\chi_F = 4.0$, $\chi_{Li}=1.0$, $\chi_{Ba}=0.9$.

Step3: Calculate electronegativity differences

For $H - S$ bond: $\Delta\chi_{H - S}=|2.5 - 2.1|=0.4$.
For $Cl - F$ bond: $\Delta\chi_{Cl - F}=|4.0 - 3.0| = 1.0$.
For $Li - F$ bond: $\Delta\chi_{Li - F}=|4.0 - 1.0|=3.0$.
For $Ba - S$ bond: $\Delta\chi_{Ba - S}=|2.5 - 0.9| = 1.6$.

Step4: Order the bonds

Based on the calculated $\Delta\chi$ values, the order of increasing ionic character is $H - S

Answer:

$H - S