Q. Use the following information to draw a temperature-composition phase diagram for the binary system of H₂O (A) and Na₂SO₄ (B) at p = 1 bar, confining t to the range 20 to 50^oC and z_B to the range 0 - 0.2. The solid decahydrate, Na₂SO₄
10H₂O, is stable below 32.4^oC. The anhydrous salt, Na₂SO₄, is stable above this temperature. There is a peritectic point for these two solids and the solution at x_B = 0.059 and t = 32.4^oC. There is a eutectic point for ice, Na₂SO₄
10H₂O, and the solution at x_B = 0.006 and t = 1.3^oC.