3. 60 g of KNO3 and 60 g of Nazso4 are placed in 100.0 g of water at 20 °C. The

Question

3. 60 g of KNO3 and 60 g of Nazso4 are placed in 100.0 g of water at 20 °C. The mixture is stirred until equilibrium is reached. A small amount of solid still remains in the beaker after equilibrium is reached. Using the graph below, determine which of the following descriptions best describes the resulting solution. (a) The solution is saturated in KNO3 and saturated in Na2SO4 (b) The solution is saturated in KNO3and unsaturated in Nazso4 (c) The solution is supersaturated in KNO3and unsaturated in Nazso4 (d) The solution is unsaturated in KNO3 and saturated in Nazso4 40 Nea Temperature (C) 165

Explanation / Answer

3. Solutions

60 g KNO3 in 100 g water

60 g Na2SO4 in 100 g water

Both at 20 oC

The statement that best describes this solution state would be,

(b) the solution is saturated in KNO3 and unsaturated in Na2SO4

according to the solubility chart shown above

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