Question

PART C 6. Explain why PbCl2 did not precipitate immediately upon addition of HCI. 7. Is Reaction 3 exothermic or endothermic? Explain your choice. 8. Explain why the PbCl2 dissolved in water in Step 12. Brookhaven College Chemistry - v3 Page 7 of 8

Answer 1

Solubility of Peel in water is low on one can consolded practically it is ins Its solcability is in the conden of 10-3 at 25° more precisely ksp is 1.6410-5 at 25°C. At ecquillibrium ksp (PBC/2) = [ Ph&t] [c1-1² as PbCl2 → P6 tp 200 If now Nol is now added (ci-l would increase gradually as nesult [Phat has to decreare to keep the ksp value constant.

So, solubility of Pholz in Wei medium decoease. but some other factors are also present which will increase the Dsolubility to some extend - When [c1 -] would be on a higher scale complenation would take place - PHC1265) + (1 — [pHC13] (aq) PECIZ(s+2014 [PLC(472-(09) The above mentiono two compleming sun which make two ions (Ptola ] and [pt E² - coould agair increase the solubility,
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