Playing with Solubility 2

Chemistry Level 2

At \(60^\circ\text{C}\), a 150 g \(\ce{KNO3}\) solution must add 22 g of \(\ce{KNO3}\) crystal or evaporate 20 g of water to become a saturated solution. Given that the density of the saturated solution is \(1.7\text{ g mL}^{-1}\). If the 150 g \(\ce{KNO3}\) solution contains 68 g of \(\ce{KNO3}\), what is the amount (in grams) of \(\ce{KNO3}\) crystal that will separate out if I cool down the solution to \(20^\circ\text{C}\)?

The solubility of \(\ce{KNO3}\) is \(30\text{ g}/100\text{ g}\) water at \(20^\circ\text{C}\).

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