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- H B H cat HCI H₂OOrder these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. relative pH of 0.1 M aqueous solution species H20 4 H,PO4 HNO, (Choose one) NO2 7 OH (Choose one) HF (Choose one) ▼CH,CH,CI (5) ? AICI,
- +) b) H30 H2OBased on the reactions: 2NO2 (g) + 2N0 (g) + O2 (g) – – > 2N½O4 (g) ; AH = -228.54 kJ 4NO (g) +2N2O (g) + 50, (5) – – > 4N,O4 (g) ; AH,=-488.46 kJ 2NO (g) + O2 (g) – - > N,O4 (g) ; AH3 = –171.34 kJ- Use Hess's Law to calculate AH for: 4N204 (g) - - > 2N½O (g) + 302 (9) + 4NO2 (g)w 11) NH 12) 1. H HOT 2. LIAIH4 3. H₂O, H* "d=-1 NBS ROOR, A OH
- Rb₂O(s) +____H₂O(1)→ Co2(CO3)3(s) + heat → 3_H₂O(1) + 1_As2O5(s) →➜ NaClO3(s) + heat → (110q000 sd, opt! 2 H3 As 0, 4 Ini Siyoda canl Mg(s) + H₂SO4(aq) → Myson noileupo unor ton boonstad to out + H₂ Om adami zogasdo neQUESTIONS FOR RESEARCH 1. Discuss the nature (organic, acids, bases, heavy metals) of AgNO3, NaOH, CH₂COOH, CH3CH₂OH and heat. COME |||₁Calculate the standard enthalpy for the reaction: 4NH:(g) + 50:(g) → 4NO(g) + 6H;0(g), through: N2(g) + O:(g) → 2NO(g) AH = -43.1 kcal mol1 N:(g) + 3H:(g) → 2NH:(g) AH = -21.9 kcal mol1 2H:(g) + O:(g) → 2H;O(g) AH = -115.6 kcal mol1
- C2H4 (g) + H2O (l) → C2H5OH (l) ΔH=? 1.C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1367,5 KJ 2.2CO2 (g) + 2H2O (I) → C2H4 (g) + 3O2(g) ΔH = 1411,1 KJ3-5: Heat of Combustion: Chicken Fat The heat of combustion (AHcomb) is the heat of reaction for the complete burning (reacting with O2) of one mole of a substance to form CO, and H,O. Calorimetry experiments that measure the heat of combustion can be performed at constant volume using a device called a bomb calorimeter. In a bomb calorimeter a sample is burned in a constant-volume chamber in the presence of oxygen at high pressure. The heat that is released warms the water surrounding the chamber. By measuring the temperature increase of the water, it is possible to calculate the quantity of heat released during the combustion reaction. In this assignment you will calculate the heat of combustion of chicken fat. The calorimeter has already been calibrated by combusting benzoic acid. 1. Start Virtual ChemLab, select Thermodynamics, and then select Heat of Combustion: Chicken Fat from the list of assignments. The lab will open in the Calorimetry laboratory with the bomb calorimeter out…H₂N H₂N NH₂ H₂NOC HN -Ho Ho H₂NOC O Flo HN. H₂C H₂NOC OH HN O CO₂H NaOH/H₂O CF CO H H₂O+