What occurs when Na2SO4(s) is added to this system, increasing the concentration of SO42-(aq)? 1.
The equilibrium shifts to the left, and the concentration of Ba2+(aq) decreases.
2.
The equilibrium shifts to the left, and the concentration of Ba2+ (aq) increases.
3
The equilibrium shifts to the right, and the concentration of Ba2+ (aq) decreases.
The equilibrium shifts to the right, and the concentration of Ba2+ (aq) increases.

3

decreases Ba2+ because add SO42- is increase concentration. reaction with Ba2+

1

It also moves to the left.

Explanation:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.