Lab Experiments

2. Using a 10-mL graduate cylinder, exactly 2.0-mL of the chilled distilled peeing was added to the mortar, the mixture swirled so tout ensemble the hard was dissolved and the solution poured into the beaker containing the ground solid. The volume of water added was recorded.

3. Drops of chilled distilled water were added in 2-drop increments, and the solution swirled to dissolve the salt.

4. This procedure was continued until all the solid was dissolved, recording the amount of chilled distilled water added.

5. locomote 1-4 were restate for a total of 3 trial using KCL.

6. Steps 1-4 were then repeated 3 times using NaCl.

experiment and Calculation Summary

Volume of water (mL) added to rinse salt

recite of drops of water added to saturation

3.

If the experiment were through with(p) above 90oC, the Ksp for NaCl would be higher than the Ksp for KCl. This is because the K+ ions is larger than the Na+ ion and therefore there is more distance between the ions and the weaker the bonds keeping them together (Clark, 2002). The capacity released as the ions bond with water molecules move and the enthalpy of the solution falls. The lattice energy for KCl is lower than that for NaCl and the hydration energy of the chloride ions is also lower. The reaction becomes more endothermic and therefore the heighten is less soluble.

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