# 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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