The solubilities of ammonium bromide, NH4Br, in water at 0°C, 20°C, and 80°C are as follows:
Which of the following fractional crystallization schemes would produce the highest percent yield for the recrystallization of ammonium bromide?
A) A solution containing 50.5 g NH4Br in 100.0 g H2O at 20°C is cooled to 0°C.
B) A solution containing 115 g NH4Br in 200 g H2O at 80°C is cooled to 0°C.
C) A solution containing 120 g NH4Br in 100 g H2O at 80°C is cooled to 20°C.
D) A solution containing 100 g NH4Br in 100.0 g H2O at 80°C is cooled to 20°C.
E) A solution containing 95 g NH4Br in 175 g H2O at 80°C is cooled to 0°C.
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