3. Solubility data for copper(II) nitrate (Cu(NO3)2) and potassium nitrate (KNO3) atdifferent temperatures is shown below. The values are for grams of compound per 10milliliters of water.0°C20°C40°C60°C80°C100°CCu(NO3)2 8.3512.516.318.220.824.7KNO31.33.26.411.016.924.6Remember that the solubility of a compound refers the maximum amount of compoundthat can be dissolved in a particular solvent at a particular temperature. So for example,the maximum amount of copper(II) nitrate that can be dissolved in 10 mL of water at80°C is 20.8 grams, and the maximum amount of potassium nitrate that can bedissolved in 10 mL of water at 80°C is 16.9 grams.a. How much potassium nitrate could you dissolve in 25 milliliters of water at 60°Cbased on the data in the table above? (Hint: use the solubility as a conversion factor inthe calculation.)b. Could you dissolve 3.0 grams of potassium nitrate in 5 milliliters of water at 60°C?Indicate Yes or No.Explain your answer below. You will isolate the precipitated potassium nitrate using suction filtration. Suctionfiltration will allow you to dry your sample before weighing. You will be able to calculatethe percent recovery of the potassium nitrate since you will know the amount youadded to create the mixture of solids and the amount that you recover. The formula youwill use to calculate the percent recovery is as follows.Amount of potassium nitrate collected after precipitation (Part B)Amount of potassium nitrate used to create the mixture of solids (Part A)'x 100 = Percent recoveryMaterials NeededPotassium nitrate (14 grams per student)• Copper(II) nitrate (4 grams per student)• 0.5 M Nitric acid (10 mL per student)• Filter flask (one per student)• Büchner funnel (one per student)• Fiter paper for Büchner funnel (one piece per student)• Vacuum tubing• Hot plate• IceProcedureA. Preparation of the solid mixture1. Place a clean 125-mL Erlenmeyer flask on a balance and zero (tare) the balance.Add 14 grams of potassium nitrate (KNO3) to the flask. Add the potassium nitrate to theflask in small amounts so you don't add too much and so that you don't spill thepotassium nitrate on the balance pan. You don't have to add exactly 14 grams ofpotassium nitrate to the flask, but add as close to 14 grams as you can. Enter theamount of potassium nitrate that you add to the flask on your data sheet. Keep the flaskon the balance and proceed to the next step (Step 2).2. Zero (tare) the balance with the flask containing the potassium nitrate on the balance.Add 4 grams of copper(II) nitrate (Cu(NO3)2) to the flask. Add the copper(II) nitrate insmall amounts as you did when adding the potassium nitrate. You don't have to addexactly 4 grams of copper(II) nitrate to the flask, but add as close to 4 grams as youcan. Enter the amount of copper(II) nitrate that you add to the flask on your data sheet.

Amount of KNO3 dissolved in 10 ml of water at 60oC = 11.0 g Amount of KNO3 dissolved in 1 ml of…

80°C is 20.8 grams, and the maximum amount of potassium nitrate that can be dissolved in 10 mL of water at 80°C is 16.9 grams. a. How much potassium nitrate could you dissolve in 25 milliliters of water at 60°C based on the data in the table above? (Hint: use the solubility as a conversion factor in the calculation.) b. Could you dissolve 3.0 grams of potassium nitrate in 5 milliliters of water at 60°C? Indicate Yes or No.

80°C is 20.8 grams, and the maximum amount of potassium nitrate that can be dissolved in 10 mL of water at 80°C is 16.9 grams. a. How much potassium nitrate could you dissolve in 25 milliliters of water at 60°C based on the data in the table above? (Hint: use the solubility as a conversion factor in the calculation.) b. Could you dissolve 3.0 grams of potassium nitrate in 5 milliliters of water at 60°C? Indicate Yes or No.

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

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

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

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 41A

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