Hello,
I had a homework question that asked whether NaCl or CaCl2 has a higher melting point. I said NaCl, as I believed that the smaller radius of the Na+ ion would increase the attraction between the ions. However, CaCl2 is the correct answer. I thought that this might be due to the increased magnitude of charge on the cation, but still, sodium chloride's melting point is 801°C according to Wikipedia and calcium chloride's is 772°C.
I'm confused.