Question

A 0.624 g sample consisting of only CaC2O4 & MgC2O4 is heated at 500°C, converting the two salts of CaCO3 and MgCO3 . The sample then weighs 0.465 g. a) Calculate the percentages of CaC2O4 and MgC2O4 of the sample. b) If the sample had been heated to 900°C, where the products are CaO & MgO, what would the mixtures of oxides have weighed?

Answer 1

Date Page Eruda Step Iwlefle the equations af clucanafasidion c CaG Oy and Cal Ofe3) initial Ca Cofs)t CoCa) faral 6128.092 12 098 n8o97 Mg C2 Culs) Oipad .624-X Mg Co3ls) + COC9)n final O122 32 40 O.624-X O.624-2 42-3240 12 3240 CRere we aslume that x am of CaC2Oy gram of Mg Goyae and o.624-2 freeddant inmixtuke, sdO ue can Afend mole of them) rani queatHion madict ialo, tmsfyla= Xearmass 28.098 0f Caco 624-Amalas /2. 3240 mal

Date Fege lo0.0 b69t Oe624-nx84.8139 H2 3240 Aere 128.098 O+465 Z of Cages in Serhel = 0.379 eo 60.72% /00-60. 74 39 26% in 7 Andeba Cay 0f 5) gh Cads)t Colato inidial O-379 O39 128.92 (289 129.92 C.379 (28.97 genal o malo ok Ca 0 z O.379 /2 8.97 O-329r 560?79 28.97 ZO1647g O165 4ran of Cooz Pmag

Data Pags Wyh heet 245 122 324 Gltal O.24 (22- .240 /22-329 O.246 122 399 firal O.245 22.324 of Myos O.245 K 40. 30 Mald 122-324 G081 Tatal mali of Cao f Mgo Oc164 t0067 qu 0-2469a