U. Uetermining the K,p of Calcium Hydroxide 123 Purpose: To determine th Materia

Question

U. Uetermining the K,p of Calcium Hydroxide 123 Purpose: To determine th Materials: . spot plate . transfer pipettes - distilled water 0.100 M calcium chloride (CaCl2) 0.100 M sodium hydroxide solution (NaOH) Procedure: 1. Thoroughly wash and dry your spot plate 2. Label the wells of your spot plate #1-12 3. Using a clean transfer pipette, add 5 drops of distilled water to wells #2-11 4. Using a clean transfer pipette, add 10 drops of calcium chloride solution to well #1 5. Draw the solution from well #1 into a transfer pipette and place 5 drops of the solution into well #2. Return the excess solution in the pipette to well #1 Draw the solution from well #2 into a transfer pipette and place 5 drops of the solution into well #3. Return the excess solution in the pipette to well #2 Repeat this process for each of the remaining wells. For well #12 discard the 5 drops into the sink, with running water 6, 7. 8. With another clean transfer pipette, add 5 drops of sodium hydroxide solution to each of the wells 9. Use the tip of the pipette to mix the solutions well. 10. Examine all of the wells for the presence of a precipitate (allow a few minutes for a precipitate to form

Explanation / Answer

Solubility product means ksp tell about that solute how much dissolve in particular solvent. To calculate we know about the concentration of its ion in the salt .for a given salt calcium hydroxide have conc of calcium ion .1 M and hydroxide ion have .1. We know the formula of ksp = [Ca2+][OH-]2.

Ksp= (s)(2s)2

Ksp= (0.1)(0.2)2

ksp= 0.1×0.4=0.4

Ksp= 4×10-1M

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