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What is the standard reduction potential E for the half-reaction Al3 (aq) 3e Al(s)?
-1.68 V
What is the standard electrode potential of Nitrate?
The standard electrode potential of nitrate (NO3-) is +0.96 V. This value is for the reduction half-reaction of nitrate to nitrite under standard conditions.
How is an oxidation half reaction written using the reduction potential chart?
To write an oxidation half reaction using the reduction potential chart, simply reverse the reduction half reaction from the chart. This means changing the sign of the reduction potential value and flipping the direction of the reaction arrow. Remember to balance the reaction by adding any necessary electrons.
What is the voltage for the non spontaneous reaction between silver Ag and copper Cu and their ions?
The standard cell potential for the non-spontaneous reaction between silver and copper ions (Ag+ and Cu2+) is determined by subtracting the reduction potential of Ag+ from that of Cu2+. The cell potential would be negative as the reaction is non-spontaneous, indicating that an external voltage larger than the calculated value would be needed to drive the reaction in the reverse direction.
A voltaic cell is made of copper and aluminum electrodes What is the emf of this cell?
The EMF of a copper-aluminum voltaic cell can be determined by the standard reduction potential of each metal. Copper has a higher standard reduction potential than aluminum, so the cell will have a positive EMF. The exact value can be determined by calculating the difference between the reduction potentials of copper and aluminum.
What is the standard reduction potential E for the half-reaction Al3 (aq) 3e Al(s)?
-1.68 V
What is the standard electrode potential of Nitrate?
The standard electrode potential of nitrate (NO3-) is +0.96 V. This value is for the reduction half-reaction of nitrate to nitrite under standard conditions.
Why in the standard potential for an oxidation reduction reaction not multiplied by the coefficient?
Because standard potential is not an additive property. That is, the standard potential for a reaction will always been a certain value, no matter if you have one mol or a billion mols. Each mol has the same potential and undergoes the reaction independent of all the other mols.
What is the total reduction potential of a cell i which potassium is reduced and copper is oxidized?
The total reduction potential of a cell can be calculated by subtracting the standard reduction potential of the oxidation half-reaction from that of the reduction half-reaction. For potassium (K) being reduced, the standard reduction potential is approximately -2.93 V, while for copper (Cu) being oxidized, its reduction potential is +0.34 V. Thus, the total reduction potential of the cell is calculated as: E_cell = E_reduction (Cu) - E_reduction (K) = 0.34 V - (-2.93 V) = 3.27 V. This positive value indicates that the cell reaction is spontaneous.
What does a negative value for the standard potential indicate?
the negative value for a standard potential indicates that the reaction is not spontaneous.
What is the standard reduction potential E for the half reaction mf2 plus plus 2e - mg?
The standard reduction potential (E°) for the half-reaction ( \text{Mg}^{2+} + 2e^- \rightarrow \text{Mg} ) is approximately -2.37 V. This indicates that magnesium ions are reduced to magnesium metal, but the reaction is not favorable under standard conditions due to its negative potential. The value reflects magnesium's strong tendency to lose electrons and form cations, characteristic of its placement in the reactivity series of metals.
How is an oxidation half reaction written using the reduction potential chart?
To write an oxidation half reaction using the reduction potential chart, simply reverse the reduction half reaction from the chart. This means changing the sign of the reduction potential value and flipping the direction of the reaction arrow. Remember to balance the reaction by adding any necessary electrons.
When finding the emf of a redox reaction by Ered cathode - Ered anode and a half-reaction is reversed on the chart do you flip the sign of its reduction potential?
No, because the chart shows reduction potentials. Ered cathode - Ered anode = emf just requires you to plug in the reduction potentials the way they are. A common equation is Ered cathode + Eox anode = emf, in which case you would have to flip the sign of the anode's reduction potential, since you would need its oxidation potential. But the equation Ered cathode - Ered anode = emf is simpler and probably formed to be that way.
What is the voltage for the non spontaneous reaction between silver Ag and copper Cu and their ions?
The standard cell potential for the non-spontaneous reaction between silver and copper ions (Ag+ and Cu2+) is determined by subtracting the reduction potential of Ag+ from that of Cu2+. The cell potential would be negative as the reaction is non-spontaneous, indicating that an external voltage larger than the calculated value would be needed to drive the reaction in the reverse direction.
A voltaic cell is made of copper and aluminum electrodes What is the emf of this cell?
The EMF of a copper-aluminum voltaic cell can be determined by the standard reduction potential of each metal. Copper has a higher standard reduction potential than aluminum, so the cell will have a positive EMF. The exact value can be determined by calculating the difference between the reduction potentials of copper and aluminum.
How can one determine the best oxidizing agent?
The best oxidizing agent can be determined by looking at its ability to gain electrons and cause other substances to lose electrons in a chemical reaction. A stronger oxidizing agent will be able to more easily accept electrons and cause oxidation in other substances. This can be measured by looking at the standard reduction potential values of different oxidizing agents. The oxidizing agent with the highest standard reduction potential value is considered the strongest and best oxidizing agent.
What is the voltage of a galvanic cell made with magnesium and gold?
4.2 V
