Answer to Question #306770 in General Chemistry for kelly

Question

Describe which of the following is unsaturated, saturated, or supersaturated? All solutions are prepared from 100 g of water.

   a. 60 g KCL at 60°

   b. 60 g K₂Cr₂O₂ at 60°C

   c. 60 g Pb(NO₃)₂ at 25°C

Answer 1

a.

According solubility curve at 60°C maximum 46 g of KCl will dissolve in 100 g of H₂O. Solution of 60 g KCl in 100 g of H₂O at 60°C will be supersaturated.

b.

According solubility curve at 60°C maximum 42 g of K₂Cr₂O₇ will dissolve in 100 g of H₂O. Solution of 60 g K₂Cr₂O₇ in 100 g of H₂O at at 60°C will be supersaturated.

c.

According solubility curve at 60°C maximum 95 g of Pb(NO₃)₂ will dissolve in 100 g of H₂O. Solution of 60 g Pb(NO₃)₂ in 100 g of H₂O at 60°C will be unsaturated.