The equilibrium constant for the reaction below is 1.8 x 1019 at 298K. What is the value of the standard cell potential for this reaction?
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- Q.1: For the following reaction : K3PO4 (aq) + Al(NO3)3 (aq) ? AIPO4 (s) + KNO3 (aq) a- Write the balance molecular equation, b- Write the complete ionic equation, C- Write the net ionic equation.2. In a copper-nickel system as shown in figure, an alloy composition of 35 wt% Ni was cooled down from the temperature of 1300°C. Sketch the expected microstructures at the point a, b, c, d and e and briefly describe the development of these microstructures in the equilibrium cooling. L. L (35 Ni) 1300 L (32 Ni) a (46 Ni) a(43 Ni) L (24 Ni) d 1200 1100 20 30 40 50 Composition (wt% Ni) Temperature (°C))A water has a Total Dissolved Solids Concentration (TDS) of 250 mg/L. Estimate the equilibrium constant for the following reaction under these conditions: A+2 + B-3 <---> AB- l Log Keq = 10.2 @ I = 0 I = Ionic Strength
- Determine the BOD reaction rate constant, k, andultimate BOD, BODu.H.W3: Predict the ideal solubility of lead in bismuth at 280°C given that its melting point is 327°C and its enthalpy of fusion is 5.2 kJ mol-1, M.wt Bi=209 g/mol, M.wt Pb=209 g/mol.docs.google.com 8 gel pores and capillaries decrease with the progress of 5 points cement hydration True False Other:
- A square high-density polyethylene [a = 158 × 10-6/°C] plate has a width of 295 mm. A 177 mm diameter circular hole is located at the center of the plate. If the temperature of the plate increases by 45°C, determine: (a) the change in width of the plate. (b) the change in diameter of the hole. Answer: (a) Aw= (b) Ad = i i mm mm6. Ammonia, NH3, is a base and will readily accept a proton in accordance with the following reaction NHxaq) + H,O=NH,+ + OH- (a) Calculate the equilibrium constant, K, for this reaction at 25°C. (b) If, at some time, pH reaction at equilibrium? If not, in which direction is the reaction going? 9.0, [NH3} = 10-5 M, and [NH,*} 10-6 М, is theIf the Ksp of Sn(OH)2 (s) is 5.33 x 10-27, what is the solubility of it in the unit of mg/L?
- Which of the following redox pairs generate a potential of about -0.47 V? 2Ag(s) + Pb2+(aq) → 2Ag+(aq) + Pb(s) Cu2+(aq) + Pb(s) → Cu(s) + Pb2+( +(aq) Cu(s) + Pb2+(aq) → Cu2+(aq) + Pb(s) 2Ag+(aq) + Pb(s) → 2Ag(s) + Pb2+(aq) QUESTION 2 Which is the correct Gibbs-Helmholtz relationship? AH = AS - TAG AH AG-TAS ASAH TAG AG = AH-TAS QUESTION 3 Which is the strongest oxidizing agent? ○ 03(9) F˜(aq) 02(9) F2(g)(iii) If HOCI (hypochlorous acid) degrades in water per first-order kinetics with a rate constant of 0.12/d. the initial concentration of HOCI is 12 mg/L (a) How long does it take to be reduced to 0.8 mg/l ? (b) what would be concentration after 4 hours? (6)11-13 The Cu-Za phase diagram is shown in Figure 11-27. (a) Are any intermetallic compounds pres- ent? If so, identify them and determine whether they are stoichiometric or nonstoichiometric. (b) Identify the solid solutions present in the system. (c) Identify the three-phase reactions by writing down the temperature, the reaction in equation form, and the name of the reaction. 1100 1000- 90아 800 70아 600- 500 400- 300 200 10아 Cu 10 20 30 40 50 60 70 80 90 Zn Temperature ("C)