I. Label the wells of your spot plate #1-12 2. To wells #2-11, 5 drops of distil

Question

I. Label the wells of your spot plate #1-12 2. To wells #2-11, 5 drops of distilled water with a clean transfer pipette 3. To well #1 ,10 drops of calcium chloride 4. Place 5 drops of the solution from well #1 and place into #2 5, Place 5 drops of the solution from well #2 and place into #3 6. Repeat for all. For well #12 discard the 5 drops into the sink 7. Add 5 drops of sodium hydroxide to each of the wells. Mix the solutions 8. Examine all of the wells. Observation table well # | observation lin kal [Coros] |initial [aiwa nal [e- hnal[onal se SP blurcy,fill 3 blurey ft e 0.025 M105NO 05 3.125x fill Substonca substance ligh+ cloud 4 6 light 5625 xlo N O.IM .8125 hn 51905 3545.15 chonge 29ob25xlo MO.IM55 I6'O OS M L385 10 no 12 no

Explanation / Answer

Ksp specifies the solubility product, i.e it tells when the solution is saturated enough for no more precipitation to take place. That means once Qsp reaches Ksp, it can no longer depict any change on mixing of ions. Here the 7th observation value, Qsp= 1.95*10^-6 best represents the value of Ksp since after this no more prepitation can take place and the ions has reached to the maximum value of precipitating out.

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