Practice ProblemATTEMPT
Determine the overall cell reaction and
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Chemistry
- What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Hg2+ concentration is 1.33×10-4 M and the Al3+ concentration is 1.34 M? 3Hg2+(aq) + 2Al(s)3Hg(l) + 2Al3+(aq) Answer: V The cell reaction as written above is spontaneous for the concentrations given: Submit Answerarrow_forwardStudent A prepared a concentration cell (L) where the cathode half-cell uses an equilibrium solution of [PbBr4]2- as the source of bromide ions. On the other hand, Student B prepared a galvanic cell (H), where the bromide ion concentration in the anode is equal to that in the cathode of cell L. Cell L Pt | Br2 | Br- (1.0 M) || Br- (x M) from [PbBr4]2- | Br2 | Pt Cell H Pt | Br2 | Br- (x M) || BrO3- (0.43 M), H+ (1.00 M) | Br2 | Pt Given: E° for the reduction of Br2 to Br- = +1.07 V > Given that the electrochemical cell L gives a potential of 0.0570 V, determine the concentration of bromide ions present in its cathode half-cell.> Given: Equilibrium concentration of Pb2+ in the cathode of L = 0.15 M and Equilibrium concentration of [PbBr4]2- in the cathode of L = 0.32 M. Determine the equilibrium constant for the formation of [PbBr4]2-.> Given that the electrochemical cell H gives a potential of 0.350 V, determine the standard potential for the reduction of BrO3- to…arrow_forwardA galvanic cell is prepared according to the redox reaction shown below. A voltmeter connected to this galvanic cell under standard conditions reads 0.25 V, and ΔGrxn∘ = −44 kJ/mol. If the concentration of Ni2+ is increased to 2.0 M, then Ecell will ______ and Δ????ΔGrxn will be _________ than ΔGrxn∘. Ni(s) + 2H+(aq) ⟶⟶ Ni2+ + H2(g) A) decrease, less negative B) decrease, more negative C) increase, less negative D) increase, more negativearrow_forward
- A standard galvanic cell is constructed with Ni2+|Ni and F2|F- half cell compartments connected by a salt bridge. Which of the following statements are correct? Hint: Refer to a table of standard reduction potentials. (Choose all that apply.) -The cathode compartment is the Ni2+|Ni compartment. -As the cell runs, anions will migrate from the F2|F- compartment to the Ni2+|Ni compartment. -Ni2+ is reduced at the cathode. -F2 is reduced at the cathode. -In the external circuit, electrons flow from the F2|F- compartment to the Ni2+|Ni compartment.arrow_forwardissue 17Suppose you want to build a galvanic cell where the half-reaction at the cathode is: Fe3+(aq) + e- → Fe2+(aq) Choose a half-reaction that would take place at the anode. The choice is yours. Suggest substances that would form the electrodes of this cell.arrow_forwardWhat is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Pb2+ concentration is 7.14×10-4 M and the Mg2+ concentration is 1.35 M? Pb2+(aq) + Mg(s) Pb(s) + Mg2+(aq) Answer: V The cell reaction as written above is spontaneous for the concentrations given:arrow_forward
- What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Cu2+ concentration is 1.74×10-4 M and the Mg2+ concentration is 1.31 M ?Cu2+(aq) + Mg(s) Cu(s) + Mg2+(aq)Answer: VThe cell reaction as written above is spontaneous for the concentrations given: _______truefalse Part B: What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Pb2+ concentration is 1.02 M and the Mg2+ concentration is 9.19×10-4 M ?Pb2+(aq) + Mg(s) Pb(s) + Mg2+(aq)Answer: VThe cell reaction as written above is spontaneous for the concentrations given: _______truefalse Part C: What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Pb2+ concentration is 1.45 M and the Cr3+ concentration is 1.02×10-4 M ?3Pb2+(aq) + 2Cr(s)3Pb(s) + 2Cr3+(aq)Answer: VThe cell reaction as written above is spontaneous for the…arrow_forwardWhat is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Cu2+ concentration is 1.25 M and the Al3+ concentration is 4.96×10-4 M ?3Cu2+(aq) + 2Al(s)3Cu(s) + 2Al3+(aq)Answer: ___VThe cell reaction as written above is spontaneous for the concentrations given: TRUE/FALSE?arrow_forwardA standard galvanic cell is constructed in which a Cu2+ | Cu+ half cell acts as the cathode. Which of the following statements are correct? Hint: Refer to a table of standard reduction potentials. (Choose all that apply.) As the cell runs, anions will migrate from the other compartment to the Cu2+|Cu+ compartment. The cathode reaction is Cu+ -> Cu2+ + e-. F2|F- could be the other standard half cell. In the external circuit, electrons flow from the other compartment to the Cu2+|Cu+ compartment. The anode reaction could be Zn -> Zn2+ + 2e-.arrow_forward
- Direction: Choose two (2) elements for the galvanic cell in the table below. Afterward, do and answer the following questions: Draw the hypothetical galvanic cell Formulate and balance the half-reactions at the anode and cathode. Calculate the standard cell potential (or voltage) generated during the redox reactions at the anode and cathode; Include the cell diagram/notation Explain the feasibility of the design of the galvanic cell in terms of a) standard cell potential generated and b) cost-effectiveness.arrow_forwardWhat is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Hg2+ concentration is 3.43×10-4 M and the Mg2+ concentration is 1.35 M ?Hg2+(aq) + Mg(s) Hg(l) + Mg2+(aq)Answer: VThe cell reaction as written above is spontaneous for the concentrations given: true or false?arrow_forwardWhat is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Ag+ concentration is 1.15 M and the Cr3+ concentration is 7.31×10-4 M ?3Ag+(aq) + Cr(s)--->3Ag(s) + Cr3+(aq)Answer: _____ VThe cell reaction as written above is spontaneous for the concentrations given: (TRUE/FALSE)arrow_forward
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