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- The following equation describes the equilibrium that exists when the weak acid propionic acid (C2H5 CO,H) dissolves in water. (In acting as an acid, the -CO2H group supplies H+ to form H30*.) C2H; CO,H(aq) +H2O(l) 2 H,0+ (aq) + C2 H; CO2-(aq) a Which of the four species are Bronsted-Lowry acids? (Select all that apply.) O H20 O C2H; CO2- O H3o+ O C2H; CO,H b Which of the four species are Brønsted-Lowry bases? (Select all that apply.) O H2O O C2H;CO2 O H30+ O C;H; CO,H(6) HBr (7) NaOH Na,Cr,0, (8) (9) H3C DMSO H2SO, CI4G VOLTE O 76 14 4:58 7 February 2021 4:57 PM (ii) Calculate the lattice energy of Silica oxide (SiO2) from the data given below: Si (g) - Si (s) AH° = -454 kJ mol-1 S1A+ (E) + 4e" Si (3) AH° = -9949 kJ mol-1 20 (g) – 02 (3) AH° = -498 kJ mol-1 02 (3) 0 (g) + 2e AH° = -737 kj mol-1 Si (s) + 02 (3) → SiO2 (s) s14+ (6) - 202- (3) – SiO2 (s) AHf (SIO2)= -910.9 kj mol1 AH°lattice = ? Share Favourite Edit Delete More
- 18. (a) Molecule N₂H4 (1) + 2 H₂O2 (1) → N2(g) + 4 H₂O (1) Complete the following table: Lewis Dot Structure (use dots or lines to show bonds) (b) (c) (d) N₂H4 H₂O2 N₂ H₂O Calculate the AH°rxn using average bond energies (Table 9.4 in textbook) Calculate the AH°rxn using the standard enthalpies of formation (Appendix 2 in textbook) Why are these two values slightly different?Calculate AH for the following reaction, FeO(s) + CO(g) -----> Fe(s) + CO2(g), from the following data, Fe2O3(s) + 3CO(g) -----> 2Fe(s) + 3CO2(g) 3Fe2O3(s) + CO(g) > 2FE3O4(s) + CO2(g) Fe;O4(s) + CO(g) AH = -23 KJ AH = -39 KJ --- -- -----> 3FeO(s) + CO2(g) AH =+18 KJ %3D(3) Me BuLi ŞiMe3 E 1) BnBr, NaH 2) Hg2+, H₂O F
- (f) Potassium permanganate (g) Sodium hypochlorite (h) Beryllium bicarbonate (1) Ammonium dichromate (G) Iron (II) chlorideX Incorrect. Write a balanced equation for the formation reaction of each of the following substances: Edit (a) K3PO4(s) Н РО, (1) + зко, ()-к,РО, + ЗН,О (b) acetic acid, CH3CO2H(I) 2C(graphite) + 2H,(g) + 0,(g)→CH,CO04(1) (c) trimethylamine, (CH3)3N(g) 3CH,0,(1) + NH, (g)→(CH,),N(g)+3H,O (d) bauxite, Al203(s) 4Al + 30,–2Al,03 eTextbook and Media Save for Later Attempts: 1 of 3 used Submit Answer(f) ZNCO; (g) NaHSO4 (h) Ba(C10,)2 (i) MgO, G) CrBr3
- Which of the following reactions would have a positive AS°? (i) Na₂SO4(s)- --> 2 Nat(aq) + SO4²-(aq) 6 CO2(g) + 6 H₂O(l) --> C6H12O6(s) + 6 02(g) N₂(g) + 3 H₂(g) --> 2 NH3(g) N₂O4(g) --> 2 NO₂(g) Pb(s) + Br₂(1) --> PbBr₂(s) (ii) (iii) (iv) (v) Oi, iv O ii, v Oiii, iv O ii, vHow do I (a) determine the energy change in the following reaction2 O2 + CH4→ CO2 + 2 H2Ogiven the following bond dissociation energies:C-C 340kJ/mol; C-H 420kJ/mol; O=O 490 kJ/mol; O-H 460 kJ/mol; C=O 720 kJ/mol. (b) Is the reaction exothermic or endothermic? Explaination?Complete and balance the following equations: (a) CaO(s) + H2O(1) (b) Al>O3(s) + H*(aq) (c) NazO2(s) + H20(I) (d) N2O3(8) + H20(1) (e) KO2(s) + H,0(1) (f) NO(8) + O(8)