At 20 C, for 1,000 kg of a mixture of 50 wt% Na 2 SO 4

At 20^οC, for 1,000 kg of a mixture of 50 wt% Na₂SO₄.10H₂O and 50 wt% Na₂SO₄ crystals, how many kg of water must be added to completely dissolve the crystals if the temperature is kept at 20C at equilibrium ? Use Figure 4.23.

Transcribed Image Text:

Temperature, °C 60 50 40 30 20 10 0 -10 I DI 0 Homogeneous solution. Ice + solution E Na₂SO4 10H₂O + solution Ice + eutectic I 10 I 20 Figure 4.23 Solubility of sodium sulfate in water. C Na₂SO4 10H₂O + eutectic 1 1 | 30 1 B F GI Solid Na₂SO4 + solution Solids - Na₂SO4 + Na₂SO4 10H₂O 1 40 50 60 Weight percent Na₂SO4 1 1 70 1 1 80 T 90 H 1 100