Indicate whether each of the following solutions at 45 degree Celsius is saturated, unsaturated, or supersaturated?...
Indicate whether each of the following solutions at 45 degree Celsius is saturated, unsaturated, or supersaturated?
A. 22g KNO3 in 100mL of water
B. 30g KNO3 in 100L of water
C. 75g of KNO3 in 100mL of water
Homework Answers
a)
at 45 °C = solubility of KNO3 --> 70 g of salt / 100 mL water
so:
a)
22 g < 70g, this mus be UNSATURATED, since you can still add more salt
b)
30 g < 70 g, this mus be UNSATURATED, since you can still add more salt
c)
75 g > 70 g, this must be SUPERSATURATED, since there is excess, so crystals will form
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