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A voltaic cell SIMILAR to that shown in Figure 20.5 is constructed. One electrode compartment consists of a silver strip placed in a solution of AgNO3, and the other has a iron strip placed in a solution of FeNO3, The overall cell reaction is given below.
(Ered Fe+2 is -0.440)
2 Ag+(aq) + Fe(s) = 2 Ag(s) + Fe2+(aq)
(a) Write the half-reactions that occur in the two electrode compartments. (Type your answer using the format [Ag]+ for Ag+ and Ag for Ag. Also, the first box gets the coefficient)
Compute the change in entropy of the universe if water vapor of one mol condenses to liquid water at the temperature of 100°C in a thin flask in an ambient laboratory temperature of twenty five degree celsius.
A cannonball made of iron has a volume of 115 cm3. If iron has a density of 7.86 g/cm3, what is the mass in grams of the cannonball?
By titration, 23.4 mL of aqueous H2SO4 neutralized 24.8 mL of 0.0495 M LiOH solution. What was the molarity of the aqueous acid solution?
Calculate the mole fraction of water in this solution, assuming that the KI is completely dissociated. b) Predict the vapor pressure of water over this solution at 25 °C, assuming complete dissociation of the KI.
Three gases, hydrogen, helium, and krypton are confined in a 10.0 L vessel at a pressure of 6.00 atm. The vessel contains 4.00 moles of hydrogen, 3.00 moles of helium, and 5.00 moles of krypton.
the equivalence point i know you need to use [A-]= moles of HA/(vol water added+vol NaOH added) and believe moles of HA=5.39x10^-3
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
an automobile gasoline tank holds 21 kg of gasoline. When gasoline burs, 81 kg of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
Determine the Volume of air and partial pressure of nitrogen, oxygen, water vapor and air
A first order reaction has an activation energy of 65.7 kJ/mol and a frequency factor (Arrhenius constant) of 2.36 x 1013 sec -1. Calculate the rate constant at 18 oC
How can one decompose superabsorbent polymers? That is how can one make the dry crystals smaller?
As a technician in a large pharmaceutical research firm, you need to produce 350.mL of 1.00 M potassium phosphate buffer solution of pH = 6.87. The pKa of H2PO4- is 7.21.
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