The net ionic equation for formation of an aqueous solution of NiI 2 accompanied by evolution of CO 2 gas via mixing solid NiCO 3 and aqueous hydriodic acid is . 2NiCO3 (s) HI (aq) 2H2O (l) CO2 (g) 2Ni2 (aq) NiCO3 (s) I- (aq) 2H2O (l) CO2 (g) Ni2 (aq) HI (aq) NiCO3 (s) 2H (aq) H2O (l) CO2 (g) Ni2 (aq) NiCO3 (s) 2HI (aq) 2H2O (l) CO2 (g) NiI2 (aq) NiCO3 (s) 2HI (aq) H2O (l) CO2 (g) Ni2 (aq) 2I- (aq)

Explanation:

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The balanced chemical equation will be:

The total ionic chemical equation will be:

The ions which are present on both the sides of the equation are iodide ions and hence are not involved in net ionic equation.

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.

the answer is learned