Reaction between ammonium chloride and calcium hydroxide
The equation for this reaction is:
2NH4Cl(s) + Ca(OH)2(s) → CaCl2(s) + 2NH3(g) + 2H2O(l)
I don't understand why these two solid can react with each other in solid state.
Also, I don't understand why calcium chloride formed is in solid state, not dissolved in water formed and become aqueous solution.