Question

19 Question (1 point) See page 302 "Native, or elemental copper can be found in nature, but most copper is mined as oxide or sulfide minerals. Chalcopyrite (CuFeS2) is one copper mineral that can be converted to elemental copper in a series of chemical steps. Reacting chalcopyrite with oxygen at high temperature produces a mixture of copper sulfide and iron oxide. The iron oxide is separated from CuS by reaction with sand (SiO2). Cus is converted to Cu S in the process and the CuS is burned in air to produce Cu and SO: 2CuFeS2 +302- 20uS +2Fc0-250, 2F50 +25102 — 2Fesio, 2018 Cuss Cu,s++20, - 2Cu +250,

Answer 1

Given seactius are 2 Cus t2fe 0+ 2 S0, 2 Cufe s2 t 302 FeO +2si0 2 RS102 2 Cus Cus tS CySts t2 0 Ca2 Cu t 2S02 4 add t t t Overall Seachon

Cu +2 fes 0 t +2 fesiog 2 Cufe S t 5a,tSi0, 4s Part-1 pdued Ca mole Nolas mass 3 63.5 Cu-63.5 O.0472 Accovbiag to Balanad chonical estion aleof Cufes s resured ele ot Cu produ cum fo 2 2 1x 00472 Mok at Cufes2 0.0472Mole Nele t Cues resuired- 0.0472 O0472 X183.5 Malaa nan of Cufes 183) 8-669 mars of Cufes is fer 8-669 resuire pen pennies Mas Cufes 2.669%100 866.9

pait-2 Hhat means 1e uohen use need ko use have take 1007 o etCufes actual resuird man pesnies (from 6-958 past-) 100 For 82 Cufes we take 1o 82 866 82 1OS7.2 Ans Part each Atep has C3 jaling coffee 921 yeid the ufes t 30 2Cus + 2Peo t S02 Asume loo o le 82 Cus Cs t 82 82X 82 82x82

2 s02 2 Cu lD Cu, S t S 20 8222 82 55.13 etechve yeildss 13 au 86P 366.97 0 Cufes, lo reguud to make 10D pennis it 10Dyeil part-4 From 55.13/yei we have t take l00feCus 5s.13 366.91 /00 866.9 SS13 1S12. 465 Ans
quest6is based on easy concept (mole concept and percentage yield),

It is lengthy due to its calculation.