EXERCISE 1: Preparation of a standard solution of copper(Il) sulfate pentahydrate 1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuS04-5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4-5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so that it is homogeneous). 6. You have now prepared a standard solution (or stock solution) of copper(II) sulfate pentahydrate. Label this solution Solution S. Calculations Determine the molarity of Solution S (v = 100.00 mL). Show your calculations and pay attention to significant figures
EXERCISE 1: Preparation of a standard solution of copper(Il) sulfate pentahydrate 1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuS04-5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4-5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so that it is homogeneous). 6. You have now prepared a standard solution (or stock solution) of copper(II) sulfate pentahydrate. Label this solution Solution S. Calculations Determine the molarity of Solution S (v = 100.00 mL). Show your calculations and pay attention to significant figures
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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Transcribed Image Text:EXERCISE 1: Preparation of a standard solution of copper(II) sulfate
pentahydrate
1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CUSO4-5H2O) by taring using a
clean and dry empty 250-ml beaker.
2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker.
3. Dissolve all the crystals of CuSO4-5H2O in the water using a clean glass rod for stirring.
4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the
beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the
rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric
flask. This is called quantitative transfer of the solution.
5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to
use a dropper to add the last few drops of water to ensure the meniscus is on the calibration
mark). Close the volumetric flask with a stopper and mix the solution well (so that it is
homogeneous).
6. You have now prepared a standard solution (or stock solution) of copper(II) sulfate
pentahydrate. Label this solution Solution S.
Calculations
Determine the molarity of Solution S (v = 100.00 mL).
Show your calculations and pay attention to significant figures
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