**Question:**Using the figure below, calculate the minimum mass of potassium nitrate required to form a saturated solution in 250 g of water at 20 °C.**Graph Description:**The graph shows solubility curves for three salts: KNO₃ (potassium nitrate), KCl (potassium chloride), and KClO₃ (potassium chlorate). The x-axis represents temperature in degrees Celsius, ranging from 0 to 100 °C. The y-axis represents solubility in grams of solute per 100 grams of H₂O, ranging from 0 to 100 g/100g H₂O.- **KNO₃:** The curve for potassium nitrate rises steeply with increasing temperature. At 20 °C, the solubility is approximately 32 g/100g H₂O.- **KCl:** The curve for potassium chloride is less steep, indicating moderate solubility change with temperature. At 20 °C, it is approximately 34 g/100g H₂O.- **KClO₃:** This curve is the least steep, with lower solubility at lower temperatures, and intersects the KNO₃ curve around 80 °C.**Calculation Instruction:**To find the minimum mass of KNO₃ needed:1. Determine the solubility of KNO₃ at 20 °C from the graph, which is 32 g/100g H₂O.2. Since the solution needs to be prepared in 250 g of water, calculate the required mass of KNO₃ using proportional scaling: \[ \text{Mass of KNO₃} = \left( \frac{32 \text{ g KNO₃}}{100 \text{ g H₂O}} \right) \times 250 \text{ g H₂O} = 80 \text{ g KNO₃} \]Thus, 80 grams of potassium nitrate are required to form a saturated solution in 250 grams of water at 20 °C.

First we need to find the solubility of potassium nitrate at 20°C. Using they solubility and given mass of water , we can calculate the mass of potassium nitrate needed to make saturated solution. The solubility of potassium nitrate at 20°C from given graph is shown as : Solubility of KNO3 at 20°C = 47 g / 100 g water So, to make a saturated solution in 100 g water 47 g KNO3 is needed. Given mass of water = 250 g So, mass of KNO3 needed to make saturated solution in 250 g water is : 250 g water × ( 47 g KNO3 / 100 g water ) = 117.5 g KNO3 Rounding off , we have : Minimum mass of potassium nitrate needed to make saturated solution in 250 g water is 120 g .

Science

Chemistry

Using the figure below, calculate the minimum mass of potassium nitrate required to form a saturated solution in 250 g of water at 20 °C? 100 e o sa to 20 10 0 0 10 30 KNO, - 40 KCI 50 Temperature *C 60 KCIO, 70 80 90 100

Using the figure below, calculate the minimum mass of potassium nitrate required to form a saturated solution in 250 g of water at 20 °C? 100 e o sa to 20 10 0 0 10 30 KNO, - 40 KCI 50 Temperature *C 60 KCIO, 70 80 90 100

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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