PRACTICAL: STANDARD SOLUTION & DILUTIONS Dilutions of Solution S Prepare dilute solutions of copper(II) sulfate pentahydrate from Solution S. You must pipette Solution S from a small beaker. Solution 1: Transfer 15.00 mL of water from a burette to a 50-mL conical flask. Then add 5.00 mL of Solution S with a 5-mL pipette. Mix the solution well. Label this solution Solution 1. Solution 2: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 250-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 2. Solution 3: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 50-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 3. Solution 4: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 100-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 4. Calculations: Determine the molarities of Solutions 1, 2, 3 and 4. Apply the rules of significant figures Solution 1: Solution 2: Solution 3: Solution 4: Transfer the solutions into small vials. The volumes in the vials should be very nearly equal. Then place the vials (containing the solutions) on a white piece of paper next to each other. Look very carefully at the intensity of the colour of each solution. Arrange the solutions S, 1, 2, 3 and 4 in order of decreasing intensity of the colour: Is there any relationship between the concentration of each solution and the intensity of the colour of the solution? Explain.
PRACTICAL: STANDARD SOLUTION & DILUTIONS Dilutions of Solution S Prepare dilute solutions of copper(II) sulfate pentahydrate from Solution S. You must pipette Solution S from a small beaker. Solution 1: Transfer 15.00 mL of water from a burette to a 50-mL conical flask. Then add 5.00 mL of Solution S with a 5-mL pipette. Mix the solution well. Label this solution Solution 1. Solution 2: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 250-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 2. Solution 3: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 50-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 3. Solution 4: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 100-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 4. Calculations: Determine the molarities of Solutions 1, 2, 3 and 4. Apply the rules of significant figures Solution 1: Solution 2: Solution 3: Solution 4: Transfer the solutions into small vials. The volumes in the vials should be very nearly equal. Then place the vials (containing the solutions) on a white piece of paper next to each other. Look very carefully at the intensity of the colour of each solution. Arrange the solutions S, 1, 2, 3 and 4 in order of decreasing intensity of the colour: Is there any relationship between the concentration of each solution and the intensity of the colour of the solution? Explain.
Chapter11: Properties Of Solutions
Section: Chapter Questions
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Transcribed Image Text:PRACTICAL: STANDARD SOLUTION & DILUTIONS
Dilutions of Solution S
Prepare dilute solutions of copper(II) sulfate pentahydrate from Solution S. You must pipette
Solution S from a small beaker.
Solution 1: Transfer 15.00 mL of water from a burette to a 50-mL conical flask. Then add 5.00 mL of
Solution S with a 5-mL pipette. Mix the solution well. Label this solution Solution 1.
Solution 2: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 250-mL volumetric flask. Then
add enough water up to the calibration mark. Mix well. Label this solution Solution 2.
Solution 3: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 50-mL volumetric flask. Then add
enough water up to the calibration mark. Mix well. Label this solution Solution 3.
Solution 4: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 100-mL volumetric flask. Then
add enough water up to the calibration mark. Mix well. Label this solution Solution 4.
Calculations:
Determine the molarities of Solutions 1, 2, 3 and 4.
Apply the rules of significant figures
Solution 1:
Solution 2:
Solution 3:
Solution 4:
Transfer the solutions into small vials. The volumes in the vials should be very nearly equal. Then place
the vials (containing the solutions) on a white piece of paper next to each other. Look very carefully at
the intensity of the colour of each solution.
Arrange the solutions S, 1, 2, 3 and 4 in order of decreasing intensity of the colour:
Is there any relationship between the concentration of each solution and the intensity of the colour
of the solution?
Explain.
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