Concept explainers
Interpretation:
The partial pressure of
Concept introduction:
The function of concentrations of those chemical species that are involved in a
The Nernst equation which is used to determine the cell potential is as follows:
Here,
The reaction quotient is the ratio of molar concentration of the ions in the product to that of reactants, raised to power their stoichiometric coefficient.
The relationship between temperature units, Kelvin and Celsius, can be expressed as:
The pH of a compound is calculated by the expression:
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ALEKS 360-ACCESS (18 WEEKS)
- What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the H2 pressure is 1.08×10-3 atm, the H+concentration is 1.30M, and the Co2+ concentration is 9.41×10-4M ? 2H+(aq) + Co(s) ---->H2(g)+ Co2+(aq)Answer: ______VThe cell reaction as written above is spontaneous for the concentrations given: _______t or f.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 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_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
- 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 Pb2+ concentration is 3.43×10-4M and the Cr3+ concentration is 1.43 M ? 3Pb2+(aq) + 2Cr(s)3Pb(s) + 2Cr3+(aq)Answer: VThe cell reaction as written above is spontaneous for the concentrations given: 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 1.17 M and the Mg2+ concentration is 6.03×10-4 M ? Pb2+(aq) + Mg(s) Pb(s) + Mg2+(aq)Answer: VThe cell reaction as written above is spontaneous for the concentrations given: _______truefalsearrow_forwardWhen the Pb2+ concentration is 1.10 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.361V. What is the Mg2+ concentration?Pb2+(aq) + Mg(s) Pb(s) + Mg2+(aq) Answer:___Marrow_forward
- What is the calculated value of the cell potential at 298 K for an electrochemical cell with the following reaction, when the H2 pressure is 7.53×10-3bar, the H+ concentration is 1.15 M, and the Zn2+ concentration is 5.73×10-4 M ? 2H+(aq) + Zn(s) H2(g) + Zn2+(aq)Answer: VThe cell reaction as written above is product-favored (spontaneous) for the concentrations givenarrow_forwardLearning Goal: To learn how to use the Nernst equation. The standard reduction potentials listed in any reference table are only valid at the common reference temperature of 25∘C and standard conditions of 1 MM for solutions and 1 atm for gases. To calculate the cell potential at nonstandard conditions, one uses the Nernst equation, E=E∘−(2.303RT/nF) log10Q where E is the potential in volts, E∘ is the standard potential at 25 ∘C in volts, R=8.314J/(K⋅mol) is the gas constant, T is the temperature in kelvins, n is the number of moles of electrons transferred, F=96,500C/(mol e−) is the Faraday constant, and Q is the reaction quotient. At the common reference temperture of 298 K, substituting each constant into the equation the result is E=E∘−(0.0592 V/n)log10Q a) Calculate the standard cell potential at 25 ∘C for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) b) What is the cell potential for the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 57 ∘C when [Fe2+]= 3.80 MM and [Mg2+]= 0.210 MM .arrow_forwardconstant current of 30.0 A is passed in a sample of salt for 1hr where a electrolytic reaction happens: Na+(aq)+ e- —> Na(g): Molar Mass for Na=23g How many gram of Na is produced?arrow_forward
- A 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_forwardWhen the Pb2+ concentration is 1.13 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.357V. What is the Mg2+ concentration? Pb2+(aq) + Mg(s) Pb(s) + Mg2+(aq) Answer: M Submit Answerarrow_forwardWhat is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Ag+ concentration is 9.35×10-4 M and the Mg2+ concentration is 1.23 M ?2Ag+(aq) + Mg(s)===>2Ag(s) + Mg2+(aq)Answer: _________________VThe cell reaction as written above is spontaneous for the concentrations given: _______________arrow_forward
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