Which of the following compounds provides the most solute particles when completely dissociated in water?
a) Na3P because it dissociates into four ions.
b) NaCl because the mass of the formula unit is the smallest.
c) MgCl2 because the mass of the particles is greater.
d) NH4 because it dissociates into five ions.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)