3. In oxidation-reduction (redox) reactions, electrons are often transferred fro

Question

3. In oxidation-reduction (redox) reactions, electrons are often transferred from a metal to a non- metal, as in the equation below. 2 Na (s) + Cl2 (g) 2 NaCl (s) a. In general, ionization energy is a good predictor of reactivity in metals in redox reactior For example, strontium is more reactive toward oxidation than calcium, and it has a smaller ionization energy. Explain the connection between these properties. pts) b. Do you think ionization energy would be a good predictor of reactivity of non-metals in redox reactions? If not, what periodic property would likely be a better predictor? Explain your answer. (2 pts)

Explanation / Answer

3. A

Because Strontium's outermost electron is in 5s rather than 4s (in Calcium): it experiences more electron repulsion which decreases ionisation energy by reducing the electron's ability to get close to the nucleus.

These two factors (atomic radius and electron shielding) decrease the effective nuclear charge experienced by the outermost electron in Strontium, causing the first ionisation energy to be lower than that of Calcium.

Strontium is a much larger element, so the outermost electron will be further away from the nucleus (larger atomic radius. This distance decreases the attration of the electron to the nucleus, decreasing the first ionisation energy

3 B.

nonmetals have similarly high electronegativity values, it is unreasonable to assume that there will be a transfer of electrons between them in an oxidation-reduction reaction.hence Ionisation energy won't be an efficient factor to predict , but it is not necessary that complete transfer of electron take place for redox reaction. electron can be covalent bond and can make one atom electro negative and one can be electro positive.

Oxidicing and reducing properties can be a good deteedining factor for non metals, Oxidizing power increases with increasing electronegativity.

The very electronegative nonmetals are poor reducing agents. Electronegative nonmetals. These nonmetals have electronegativities between 1.9 and 2.8. These elements have few laboratory uses as oxidizing agents. Hence reduction potential and Oxidation potential on the bases of their electronegativity we can predict non metals oxidation reduction properties.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.