Question

4. -18 points was OSGenChem1 43 WA 005 Thermite is a metal powder mixture used frequently in pyrotechnics and metal construction work. It is composed of highly powderized aluminum and iron(I1) oxide and when ignited by a high temperature source (such as burning magnesium ribbon), it reacts according to the following equation. Fe,O(s) + 2 Al(s) 2 Fe() Al,0,(s) What mass of powderized Al is required to completely react with 34.7 g Fe,o,? 9 Al O-8 points OtAtomsChem1 75P088 My 5. What volume (in ml) of 0.06457 M HNO, is required to react completely with 0.2462 g of potassium hydrogen phosphate? 2 HNO,(aq) KH(a)H,Po(aq) 2 KNO3(aq) Supporting Materials Constants and Supplemental Data Periodic Table Factors

Answer 1

FlO3 st 24 s 2 Flyt A0 (8) Mass of. Fer Oz z 34.79 Molar mass of FlqOz 159.7 g/mol - цр ш о Тб, чач , О, Molar mads of Fero - 3ч. 59 15°) - 74 fu) 0 2 4 w и. I wole of Flal, neede 2 more of Al. so mole of Al needed a 2x0.217 2 О, ЧЗул ри. MCоlол мач от Амг 24 з 14 | nimas of powdered Alluminium needed is то, чта мощ X 2 1 /uso1: 1. 18 2 2 | 2 | 5. 2 HNO3 last RH poyzae H₂Poyagt 2 KNO3 ar Mou, о к HP 2 O. 2462 . o lол & " К роу - 1 ч. 2 9/0 | . . olu 1к, й роу о 296 19 - 000 192u. 11. 2-а / p1 2 moles of HNO3 need Imole of KzHpoy. moll of HNO₂ needed 22x0.0014 2 0.0028 moler. . NO,

nolarity & molee of colite x1000 volume of colution (m) Molarity of HNO₂ a 0.08457 M. volume of HNO₂ = now of white x1000 Molarity 2 0.0028 moles x 1000 - 2 33.108 ml 0 08457M ~ 33.1ne