Answer:
El potencial celular estándar, [tex]E_{cell}[/tex] is +0.46 V
Explanation:
Las reacciones de media célula son;
Media reacción del ánodo Cu²⁺ + 2e⁻ ↔ Cu, E ° = 0.34 V
Media reacción catódica 2Ag + 2e⁻ ⁻ 2Ag, E ° = 0.80 V
Sin embargo tenemos para hierro Fe²⁺ + 2e⁻ ↔ Fe, E ° -0.44 V
y Fe³⁺ + e⁻ ↔ Fe²⁺, E ° = 0.77 V
que es más alta que la del cobre presente, por lo tanto, el cobre se oxidará en el ánodo
Por lo tanto, en el ánodo, tendremos
Cu → Cu²⁺ + 2e⁻ (E ° = -0.34 V)
En el cátodo
2Ag + 2e⁻ → 2Ag (E ° = 0.80 V)
[tex]E_{cell} = E_c + E_a = -0.34 + 0.8 = +0.46 \, V[/tex]
El potencial celular estándar, [tex]E_{cell}[/tex] = +0.46 V
The picture compound has which bond?
Answer:
There are C - C bonds and C - H bonds.
trust me! I took a test with this question and got 100! :)
Explanation:
Which of the following correctly describes a Brønsted-Lowry base? A. It accepts protons. B. It donates protons. C. It produces OH− ions in solution. D. It donates an electron pair.
What is the net ionic equation of
Mg(s) + Zn2+ + 2NO3 → Mg2+ + 2NO3 + Zn(s)?
A. Mg(s) → Zn(s)
B. Mg(s) + Zn2+ → Mg2+ + Zn(s)
C. Mg(NO3)2 + Zn(s) → Zn2+ + 2NO3 + Mg(s)
D. Mg(s) + Zn(NO3)2 (aq) → Mg(NO3)2(aq) + Zn(s)
Answer:
Mg(s)+Zn2+>>>>>Mg2++Zn(s) B
Explanation:
The net ionice quation of a reaction represents the net change in the reaction.Here the reaction proceeds to the formation of Mg²⁺ ion and metallic zinc. Thus option B is correct.
What is ionic equation?
A balanced equation of chemical reaction represents the perfect stoichiometric ratio of each reactants and products where each elements have to be equal in number in both side.
An ionic equation represents the ions involved in the reaction and the charges and coefficients of ions have to balanced each side.
In the electrolysis of magnesium and zinc electrodes, metallic magnesium oxidizes to Mg²⁺ions and Zn²⁺ ions reduces to metallic zinc. The NO³⁻- ions remains as same as in its aqueous state in the electrolyte.
Hence the net ionic equation is as written in option B.
To find more on ionic equations, refer here:
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During a reaction, the enthalpy of the reactants and the products are not equal. What does this result in?
A. None of these
B. Absorption or release of energy
C. Change in chemical composition
D. Spin of electrons is reversed
The spin of electrons is reversed. Hence, option D is correct.
What is enthalpy?Enthalpy is the sum of the internal energy. and pressure times volume.
During a reaction, the enthalpy of the reactants and the products are not equal which means the spin of electrons is reversed.
Hence, option D is correct.
Learn more about enthalpy here:
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