A concentration cell is constructed by using the same half-reaction for both the

Question

A concentration cell is constructed by using the same half-reaction for both the cathode and anode. What is E^0 for a concentration cell that combines silver electrodes in contact with 0.10 M silver nitrate and 0.00003 M silver nitrate solutions? (E^0 = + 0.80 V for Ag/Ag^+) + 0.21 V + 0.59 V + 0.80 V - 0.21 V + 1.01 V When an acetic acid solution is titrated with sodium hydroxide, the slope of the titration curve (pH vs. volume of NaOH added) increases when sodium hydroxide is first added. This change shows that. nothing is happening during this part of the titration. the reaction it very slow during this part of the titration a more concentrated solution of NaOH needs to be present to initiate the reaction. acetic acid is being converted to sodium acetate. the pH is not affected until all the acetic acid is consumed. When 10.5 g KBr(s) dissolves in 125 g of water at 24 2 degree C, the final temperature of the solution comes to 21.2 degree C. Assume that the heat capacity of the solution is roughly 4 18 J/g degree C) What is the molar enthalpy of solution of potassium bromide (119 g/mol)? + 19.9 kJ/mol + 167 kJ/mol + 1.76 kJ/mol + 67.6 kJ/mol +18.4 kJ/mol Consider the equilibrium CO(g) + 2 H_2(g) implies CH_3OH(l), for which Delta H degree = -128.5 kJ/mol and Delta G degree = - 29 kJ/mol at 298 K. Estimate the equilibrium constant at 313 K. 2.0 times 10^4 3.4 times 10^5 1.7 times 10^6 1.4 times 10^5 1.1 times 10^4 What is the pH of a 0.010 M acetic acid solution? (K_a for acetic acid is 1.76 times 10^-5.) 2.00 4.47 2.74 3.38 6.78 How much energy is needed to change the temperature of 275 grams of lead from 10.0 degree C to 95.0 degree C [C_p = 26.7 J/(mol degree C)] 35.5 J 113 J 3010 J 7340 J 23, 400 J The freezing point of ammonia (NH_3, 17.04 g/mol) is -77.73 degree C. In an experiment, 367.2 gram at -77 73 degree C is used to cool 250.0 grams of liquid NH_3 from 25.00 degree C to the freezing point. Assign specific heat capacity of liquid NH_3 is 4.742 J/(g middot degree C). What is the enthalpy of fusion of ammonia 2.894 kJ/mol -2.894 kJ/mol 5.652 kJ/mol -5.652 kJ/mol - 0.3315 kJ/mol

Explanation / Answer

It represent an electrolyte concentration cell

Ecell=(0.059/n)×log(C1/C2) where C1>C2

Here C1=0.10M, C2=0.00003M, n=1

Ecell=0.059×3.523=0.21 volt

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