What is the reduction potential in volts at 25 degree C for the half reaction Sn

Question

What is the reduction potential in volts at 25 degree C for the half reaction Sn^4+ + 2C rightarrow Sn^2+ when [Sn^4+] = 2.0 M and [Sn^2+] -= 1.0 times 10^-6 M? The E^n for this half reaction is 0.15 volts. -0.03 +0.05 +0.34 +0.52 An electrochemical cell is shown. Which term describes the part of the cell to which the large arrow points? Anode cathode electrolyte salt bridge The purpose of a salt bridge in a galvanic cell is to maintains charge balance in the cell. correct any volume changes in the cell. Provide ions to be oxidized and reduced. Provide a path for the flow of free electrons. Give these half reactions Cs^+ e^- rightarrow Cs E^+ = -3.026 V F_2 + 2e^- rightarrow 2F^- E^= 2.866 V what is the standard potential in volts for the reaction 2Cs + F_2 rightarrow 2CsF -5.892 -0.160 + 5.892 +8.898 In the redox reaction 2MnO_4^- (aq) + 16 H^+ (aq) + 5 Sn^2+ (aq) rightarrow 2Mn^1+(aq) + 8H_2O(l) + 5 Sn^4-(aq) the oxidation number of manganese changes from to. -1, 2 -1, 4 +2, +4 +7, +2 Which correctly distinguishes a voltaic cell from an electrolyte cell? Voltaic cell Electrolytic cell delta G 0 Reduction occurs at the method Reduction occurs at anode. Reaction kinetics are slow. Reaction kinetics are fast. The anode is positive. The anode is negative. Which can act as both an oxidizing agent and a reducing agent? H_2O_2 NaH Na_2O O_3 Which is the strongest reducing agent? Ce Li Li^+ Ce^3+ Which type of radiation can be blocked by a thin piece of paper of fabric? I only II only III only I and II A 40.0 gram sample of^235 U undergoes decay with a half -life of 7.0 times 10^2 years. What mass 10 grams of^235U remains after 2.1 times 10^9 years? 13. 10. 5.0 1.4 times 10^-4 Identify the missing reactant in the synthesis of seaborgium, Sg.^269_98 Cf^246_98 Cf^245_98 Cf 6249_102 No You just spilled 3 mL of concentrated sulphuric acid on your arm. What should you first? Cover with a thick cloth cover with solid NaHCO_3 rinse with 6 M NaOH solution rinse with copious amounts of water Which laboratory waste can be discarded down the drain? I only II only II and III only none of the chemicals listed which will have the least vigorous reaction with water? Na Mg K Ca How do the melting points change with increasing atomic number for the diatomic elements in Group 17? decrease increase not predictable little or no change

Explanation / Answer

Q56

For

Sn+4 + 2e- = Sn+2

Find Ecell half cell, given Eºcell = 0.15 V

Apply Nernst equation so

Ecell = Eºcell -0.0592/n*log(Q)

where, n = electrons being transferred, and Q = product/reactant quotient

Ecell = 0.15 - 0.0592/2 * log([Sn+2]/[Sn+4])

Ecell = 0.15- 0.0592/2 * log((10^-6)/(2))

Ecell = 0.33651 V

nearest answer is +0.34 V

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