For 10 points, give this measure of the amount of a substance that can dissolve in another substance.
The Hansen parameters are used to predict this property of a substance. Cerium sulfate is anomalous in that this property decreases as its temperature increases. The common ion effect is a decrease in this property for certain ionic compounds. Henry's law states that for a gas, this quantity is directly proportional to the partial pressure of that gas. Supersaturation occurs when the value for this quantity under normal conditions has been exceeded. For 10 points, give this measure of the amount of a substance that can dissolve in another substance. 
The Hansen parameters are used to predict this property of a substance.
solubility [accept word forms]