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Experiment 8 Solubility of CaSO4

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Experiment 8 Solubility of CaSO4

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    1. Experiment 8 Solubility of CaSO4

    2. Purpose To accurately determine the Ksp of CaSO4.

    3. Background Solubility Equilibria CaSO4(s) D Ca2+(aq) + SO42-(aq)

    4. Background Solubility Equilibria CaSO4(s) D Ca2+(aq) + SO42-(aq)

    5. Background Solubility Equilibria CaSO4(s) D Ca2+(aq) + SO42-(aq)

    6. Background Solubility Equilibria CaSO4(s) D Ca2+(aq) + SO42-(aq)

    7. Background Solubility Equilibria CaSO4(s) D Ca2+(aq) + SO42-(aq) The challenge is measuring the concentration of Ca2+ and SO42-. An indirect method is to exchange one of the ions in the equilibrium with a substance that is more easily measured. For this experiment, Ca2+ will be exchanged for H+. This is called cation exchange.

    8. Background Cation Exchange

    9. Background Cation Exchange

    10. Background Cation Exchange

    11. Background Cation Exchange

    12. Background

    13. Background

    14. Background

    15. Background

    16. Procedure Experiment 8 - For this experiment, work individually.

    17. Technique

    18. Technique

    19. Technique

    20. Technique

    21. Technique

    22. Technique

    23. Technique

    24. Technique

    25. Data

    26. Calculation

    27. Calculation Moles H+

    28. Calculation

    29. Calculation Cation Exchange

    30. Calculation

    31. Calculation Cation Exchange

    32. Calculation

    33. Calculation

    34. Calculation

    35. Calculation Cation Exchange

    36. Calculation

    37. Calculation

    38. Safety The NaOH solutions are corrosive. If you get some on your skin, wash with water for at least five minutes. If any NaOH solution gets in the eyes IMMEDIATELY wash with water for at least fifteen minutes. Call for medical assistance! The 1.5 M H2SO4 is corrosive. If you spill some on you, wash the affected area for five minutes. If the acid gets in the eyes, wash the eyes for ten minutes. Seek immediate medical attention! Neutralize any acid spills with baking soda.

    39. Waste Disposal All wastes from this experiment can be flushed down the drain with plenty of running water.

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