CW 27 - CHM 2046 Class Worksheet 27 1. Metallurgy of Iron:...

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Unformatted text preview: CHM 2046 Class Worksheet 27 1. Metallurgy of Iron: Extracting the metal from its Ores, refining (purifying) it, and W 4 2. ' 2 (a) Ores: Fe203 (hematite), Fe 04 (magnetite), FeCO3 (siderite), FeSZ (pyrite) {elbg'l'l-{l/J.) you“ (b) Reduction (smelting): Reducing agents are C-coke and CO(g), forming “pig iron.” Fe203(s) + 3 C(s) —> 2Fe(l) + 3C0(g) 2C(s) + 02 -> 2CO(g) Fe203(s) + 3 CO(g)<: 2Fe(l) + 3 C02 (g) C(s) + C02 <-> 2C0(g) Nikki/x b/l “Iii—IL, a; '00 C O na'li C1 1L: Cart/Cg 5M a,“ “La-“- 7 fart? Cr; nag”, {(442, 3L0 (c) Imp rities that are present in pig iron include several elements and oxides: Karon "Wife - ' they; (1 Metals: gap, MgO, Mn Nonmetals: C S Si, P, A1203 «7‘,R(A?LS h”, k_m.,x Lama 1W? twi- g F“ " “r The molten pig iron is treated with 02 (g) (l l) to oxidize theserirnpurities: A573,: hugs . . "x r” - . Metal Ox1des: CaO, MgO, MnO Nonmetal ox1des:§62. $10 , P205, A1203 An aqidfllaseneagfign converts these into ionic compounds which are not soluble in Fe(l). This involves a ‘ftitration,” adding CaO or SiOg (depending On which type of oxide is present in excess). ' ' , Ca0 + SiOz —> CaSi03 (l) “slag” (floats on Fe (1) and is removed) lulu-L (cj'z‘s’mf‘ ion: t..- I, 1" 0+ Milk-£314. H1 FE Lea/Lat Study Emblem. Write the equation for the removal of A1203, forming a slag containing the high temperature equivalent of aluminate ion, which is A102: ’ " *1- - "*—-> A 02’; 0‘0 J‘- I ((1) Alloys are prepared by adding “impurities” to change the mechm'cal and chemical properties of iron: new)! a)”; weight} v] I t’ 0 new; to as. _ Visiyi'asmutu 0 Carbon steel: ~ 1 % C, the balance 13 mostly Fe V1 """' ,1. J;.&l'e.£_.¢,,._ = ( sl“w We. and? PM, wt" water rel-La c 1cm: W . ' 400 series Stainless Steels: 10 % Cr, traces of others, ~ 90 % Fe I exam» 5;“) .- mg, L”; MAW LU” 4 H N53 W «ow vixen/wk an C L 0 300 series Stainless Steels: 18 % Cr, 10 % Ni, traces of others, ~ 72 % Fe ‘; uh. J" Min-é-U-"k l’:»~0--'}ALJL+-a . Matte, expustfs mi Wig—l,“ (in .L» Mme”) - Tool Steels, including “High Speed Steel”: 18 % W, 4 % Cr, 1 % V, ~ 77 % Fe wwl v33 ~ a» sir—syn jmf 0N 2. Metals —_Properties Overview. __,...._m,._.-,.....~m_..._ (a) Representative (8 and 2 block) Metals: Metals — 50%,f ’le 5r; ga‘lflk “j Silfivot/ai A Ions — Colors . m1, ' ‘ . ' ~ . _ Strengths as acids mm a, aw, % Q /R My I — Ion :7. nbnmfo bL . :5- 3 ‘ ' 6M. E". "a _ Complex Ions gblthx“. 6 Wm“ Lawflw \M ll int :fi-‘F (b) Transition (middle d block) Metals: Metals— via»?! ,LA5T}, ) ‘21 54—9 RA Ions— Colors "’l 9.0: at L» logic) ‘ — Strengths as acids: Compare Al+3 (R = 54 pm) Kg :v gal-(ft ' with Fe+3 (R=64pm) (at r (x! (f 33/», ' "I'l‘mmsil/w, with} ti”, cw. Wiiq Samara: M 4L£¢L:~ — Ion Charges/Oxidation States -—- .S Q ire-u: L .‘ Q I {- r VIMQL’L‘W Clerc-#2.. V 3 Varg- ‘lel/lavJ Elma. gown Wald: — " —- U ‘ _a -t- L; Complex lons Cap» 0% 6:.tiifL; I 0 “2,, 7 M n 0210‘ 3L who Law-w) breathing, (c) Post Transition (1B and 2B groups, lower p block) Metals: Metals— sorbk/ icy, T4, buck TE 2 'POsa‘a/ cat/3'th Ions— Colors W]; Data?) L ‘ Agar.) Zhd'l’i Jr :Ala V; a—* mla(> C l I PTf‘fleosh-lMJD-w N11) 0LT M a a.“ — omp ex ons HQ e” “4% 5*» voj 3—: "’ Taatg‘zk {This Loewe"; Study Emblems. Match the metals to the descriptions given. (a) Ba, Co, Ga {9% Q. Hard metal, many of its compounds are paramagnetic 15L Soft metal , reacts with water forming H2, OH' and M+2 %& Low melting, high boiling as the metal, 2 common ion charges (b) Mn, W, Zn 2,, Ions form many coordination complexes, all colorless w Very hard, highest oxidation state is +6 MM Known oxidation states include +2, +3, +4, +6, and +7 ...
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CW 27 - CHM 2046 Class Worksheet 27 1. Metallurgy of Iron:...

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