Which of the following reaction would you expect to take place
Correct answer: B. Fe+2+ Cu → Fe+ Cu+2
- A. Cu+2+ Mg → Cu + Mg+2
- B. Fe+2+ Cu → Fe+ Cu+2
- C. 2H++ Cu → H2+ Cu+2
- D. Mg+2+ Zn→ Mg + Zn+2
Explanation
To predict which reaction is most likely, we need to consider the relative tendency of metals to lose electrons, known as their electrode potential. A more positive electrode potential indicates a greater tendency to lose electrons (be oxidized) and become an ion. Here are the standard electrode potentials (E°) for the relevant metals:Cu²⁺ + e⁻ → Cu: E° = +0.34 VFe²⁺ + e⁻ → Fe: E° = -0.44 VMg²⁺ + e⁻ → Mg: E° = -2.37 VZn²⁺ + e⁻ → Zn: E° = -0.76 V
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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