Question

ANAL 364-Qualitatitive Analysis Discussion Topics b) You did not wash the filter paper with hot water before filtering in the step used to separate PbCl2 from AgCLand Hg.Cl 5. AIPO4, with a Kg of 9.8 x 1022 is less soluble than Cas(PO4)2, which has a Kp of 2.0 x 1029 Why? 6. Would the solubility of AlIPO, with a Kp of 9.8 x 102 or Cas(POa), which has a Kp of 2.0x 10-9 be affected by addition of 500 mL of a 0.2 M solution of sodium Write a minimum % of a page (12 font, single spaced) discussion on the experiment conducted this week. Address each requirement as fully as possible integrating the collected data, providing explanations for the observed trends and evaluating whether your original assumptions about the experiment were validated by the results. The assignment will be graded on completeness, clarity of the explanations and the meaningful integration of the collected and calculated data. phosphate? 1. What are the factors that affect solubility? 2. What physical/chemical properties allowed you to separate and confirm Lead (II), Mercury (1), and Silver (1)? Explain your answer in terms of Ksp, 3. What is common ion effect? How does Le Chatelier's principle explain it? Where did you observe this phenomenon in this lab? 4. Explain your expected results if you had made the following errors during the lab: a) 6 M NHs is accidentally added instead of hot water in the step used to separate PbCl; from AgCl and Hg:Cl t at de
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Answer 1

o factor affecting solubility, g) pressure 1 Tempr I vapoyo pressure 2 colvant nature est solutes I sample) add diluch posoluble chloride of Group I (Lower Agf, pb Hg, Cl. hot Noco, Pbch is much more soluble in a water than Age, thus adding water to precd pitated mefel Chlonde and heating apbeh dissolve . Ages, po 4 3 493 49 = preciprietate Thot water Pola taglf Hg, 27 ans . Jafning Solids Banent yellow ppt Agy dissolve because of of pberot O formation of Cogam). J Mq₂cooth 2 F Black

③ The phenomena of suppression of degree of dissocration of weak and or WB by the addition of strong electrolyte containing a common ion known as common son effect . As Ale to le-chaterlies principle if we I the cance of prodrect eluilibrium shift towards backward which is also observe in Common on effect. Age will dissolve and now ppt contain either pbl or Hg2% of Both.