The melting point and the heat of fusion of pure NiO are 2000C and 50,600J/mol, respectively. For pure MgO these values are 2800C and 77,400J/mol. Assume that both solid and liquid solutions are ideal, calculate the composition of the solid and liquid solutions in equilibrium at temperatures of 2200,2400 and 2600C. Plot these points on the phase diagram below to compare the experimental and theoretical (calculated) solidus and liquidus curves