Solution, Solute and Solvent Problem 2

Chemistry Level 2

A 80C80^\circ \text{C}, 100 g100\text{ g} of KNOX3\ce{KNO_3} saturated solution is cooled to 20C20^\circ \text{C}. What is the mass of KNOX3\ce{KNO_3} in grams that will separate out from the solvent?

Details and Assumptions:

Separate out: when it used to have some mass dissolved in a saturated solution but as the temperature decrease, the solubility decrease so some of the solute cannot remain dissolve and will return as solid/liquid state until it reaches the solubility within the new temperature.

Solubility of KNOX3\ce{KNO_3} at 80C80^\circ\text{C}: 169 g/100 g169\text{ g}/100\text{ g} water.

Solubility of KNOX3\ce{KNO_3} at 20C20^\circ \text{C}: 31.6 g/100 g31.6\text{ g}/100\text{ g} water.

You may refer Chemistry - Solution, Solute and Solvent Note.

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