Question

Which of the salt has highest and lowest freezing points?

Answer 1

In equimolar concentrations of the two compounds, 1 mole of NaCl dissociates into two moles of ions in aqueous solution (Na+ and Cl-), whereas a mole of CaCl2 dissociates into Ca++ and two Cl- ions, for a total of three moles of ions. The more ions (or molecules) in solution, the greater the freezing point depression (and boiling point elevation).

Answer 2

Sodium Chloride (Salt) :

Boiling Point = 1,413°C
Melting Point = 801°C