Class Note for CHEM 112 at UMass(26)
Class Note for CHEM 112 at UMass(26)
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This 7 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at University of Massachusetts taught by a professor in Fall. Since its upload, it has received 16 views.
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Date Created: 02/06/15
Biominerals 1 Bone amp Teeth Calcium Hydroxyapatite C33PO42 CaOH2 2 Sea Shells Aragonite CaCOs 3 Otoliths CaCOs 4 Magnetite Fe304 particles in magnetotactic bacteria mm Conch Shell Aragonite Magnelnsplrllum magnelnlaqllum one crystal form of Cacoeg1 Biominerals 1 Bone amp Teeth Calcium Hydroxyapatlle CalFoAlgCalomgl 2 Sea Shells Araganne Cacoal l owlllhs lCaCOJ 4 Magneme F2104 particles In magnemlaclic baclena Conch Shell lAragonlle one crystal elm ol C560 Ksp is An equilibrium constant that describesjust exactly how insoluble an insoluble salt is I can be used to prquCIwnen a precipitation reaction will occur Remember that when QKSp the system is at equilibrium QgtKSp reaction will shift toward precipitate QltKSp more compound will dissolve because the solution is not saturated Ag Pio2 ng2 AgCl PbClz ngClz Although all these salts are said to be insoluble they do dissolve to some SLIGHT extent AQCKS lt gt AgaQ C39aQ When equilibrium has been established no more AgCI dissolves and the solution is Ag Pb2 ng2 3 AgCl PbClz HQZCIZ AQCSltgtAgaq CI39aq When solution is SATURATED expt shows that Agt 167 x10395 M This is equivalent to the ongCI What is CI39 Some Values of KSp Table 182 Some Common Insoluble Compounds and Thai K5 Values Formula Name KP 25 at common NamesUses Cam Catcidm camonate 34 X 10 Catcite icetand spav Mmth Manganeseai Caihonate 23 X 10 Rhodochrosite forms insudinied ciystais FQCO Immal carbonate 31 x 10 siderite an dicidm uoride 53 gtlt 10 Monte Sniirce of HF and dtiier inorganic uorides Agft siiver riiton39de 13 x 10quotquot Chtnvaigyvite AgBr Siivev didmide 54 X 10 Used in photogvaphir film Casm Catciuin sdtme 49 x 113 3 The iiydratEd mm is commoiity catied gypsum 32301 Barium 5mm 11 X 10quotquot Sarita used in driiting mudquot and as a component at paints Sism Strontium sdifaie 34 X 10 7 Ceiesriie Ca0Hg Catciuin hydroxide 55 x 10 5 staked time w The Alum in iiiis table were mkuu hum isziigiiauiiimimm 0 WWW 13mmth mL139 NRCnmu iii Pubiishnm may Addmi mi Kw mlun am given in Appendmj Can only compare KSp when for salts that have the same cation anion ratio Some solubility guidelines useful but not necessary to memorize 1 All sodium potassium and ammonium salts are soluble 2 All nitrates acetates and perchlorates are soluble 3 All silver lead and mercuryl salts are insoluble 4 All chlorides bromides and iodides are soluble except silver lead and mercuryl halides 5 All carbonates sul des oxides and hydroxides are insoluble 6 All sulfates are soluble except calcium sulfate and barium sulfate an H9202SH Hg aq 2 C i39aq Witwa Ksp 11x1o1 ii22CI2 KSID product of maximum ion concs it Precip begins when product of ion concs EXCEEDS the Ksp WC l 2 Pracigi i a iiyiqan ILa rJlu39ula Salt Solublmy 4 Of quot039 ngcus H H923 aq an 39 K59 Hg 002 or 30538131 3 product of w Hg 26 maximum ion concs MM saw I 7 v Precip begins when product 0 5 1 quot 1 ion cones EXCEEDS the Kw 439 1 x 2quot 39439 U 3W 3 3 all Lulr at 4 1 H IOquot39 01 740 a 1 quot dubJan oi r 5 r 1 H H59 9 Calculate the solubility of BaSOA in a pure water and b in 0010 M BaNOa2 BaSOAs lt gt Ba2aq 8041aq KSp for BaSOA 11 X 10W Executive SUMMARY Solubility in pure water x 11x10395 M Solubility in presence of added Ba2 11 x 10398 M Le Chatelier s Principle is followed Le Chatelier s Principle is followed 11 00 mole W wt 0H0 7 mteacn mE HL H o 0 002 acdk 914 C 3 14 OM 5 44M Sluth can 4 04914 0H J cuscoz Kb w 86 V00 564 o OK wml BgCOrQL We a waoles 4 who um um 44nd wank is memhm A 14360 4 6wmolmof 61va a 4 0 WMquot ouH Mdlhm 50h o 40M sol OIL 12 m w z m m j w m A41 5113 V quot1 amt 41 33 mm an Dial M b m4 b 7 mm xs JAM gamma 043cm 0H nu Lo HM 3045 who 9 oan Wk sv c Acehc a D u m MW m Sci 039 0 WM 131le Mm mw VBW 4 gmleg 51 wk m4 5 we Mir OOlan5 WM mw l39f xm 4 0450 A VIku 0 Wm M Sb W mmmanwmm f 2720lmm W m cdadtr 5 m no 0643onng db or mg 1 WI cam 41 WIIW W 39 grim aw Hlo OH J wingl H 39 I 01 M 1 W e A 1 I won 5 N ye an unto H D aw quot1me D M K 391 W5 g i 33110 1ch Kw L K MA a w my 4 1m 7 awn m I stlv w u r was L m w m n m 51an 0wa NW L 3 4M 3 Mm M 2w m H w Mummy 4 W A Wqu W um V Aruan r 7 m u wunm rm me 5 am m e Maul cummg 645 n 9w 4 uduzc 1 r a swim mm o gummyquot E L rm 3311039 3 Moquot quot 8420 74quot 32 g Ti A W t m L A 40th FL QGHMOquot 4 v56 as 39m Kw urbanmm 0 L1 quot4 Iil0 aquot LOX 30