Solubility and Temperature KNO3 A solid mixture consists of 30.6 g of KNO3 (pota

Question

Solubility and Temperature KNO3 A solid mixture consists of 30.6 g of KNO3 (potassium nitrate) and 5.4 g of K2SO4 (potassium sulfate). The mixture is added to 130. g of water Use this solubility curve (Figure 1) to answer the questions Submit My Answers Give Up Correct Crystallization Crystallization is the opposite o dissolution. Since solids tend to dissolve better at higher temperatures, we can cause them to crystallize (i.e., undissolve) from a solution by lowering the temperature Part B If the solution described in the introduction is cooled to 0 °C, what mass of KNO3 should crystallize? Enter your answer numerically in grams Figure 1 of 1 Hints KNO, NH NaCl 30 Li SO, Submit My Answers Give Up K2SO Part C 10 KC10 This question will be shown after you complete previous question(s). 0 10 20 30 Temperature, °C Provide Feedback Continue

Explanation / Answer

Answer:-

Mass of KNO3 dissolved in 130 g H2O = 30.6 g

From the given figure, solubility of KNO3 at 0 oC = 15.0 g / 100 g H2O

So, 100 g H2O = 15.0 g KNO3

130 g H2O will dissolve = 15 x130/100

= 19.5 g KNO3

so, mass of KNO3 crystallize at 0oc = 30.6 - 19.5

= 11.1 g

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