Playing with Solubility 2

Chemistry Level 3

If a 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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