Assuming the solubility of CaCl2 is 70.1 g per 100 g of H2O for below-freezing temperatures, at which temperatures could CaCl2 (molar mass = 111 g/mol) melt ice? (Kf for water = 1.86 °C/m)
A) -15 °C and above
B) -25 °C and above
C) -35 °C and above
D) -45 °C and above
