Question at position 28 In the reaction below, what happens to sodium (Na)? Na + Cl -- Na+ + Cl-Sodium is a catalystSodium is reducedSodium is oxidized

Question

Question at position 28 In the reaction below, what happens to sodium (Na)? Na + Cl --> Na+ + Cl-Sodium is a catalystSodium is reducedSodium is oxidized

BlackTom AI · Accepted Answer

First, restating the provided items: The question asks what happens to sodium (Na) in the reaction Na + Cl --> Na+ + Cl-. The answer options are: 1) Sodium is a catalyst 2) Sodium is reduced 3) Sodium is oxidized.
Option 1: 'Sodium is a catalyst' — This would mean sodium is not consumed in the reaction and merely speeds up the reaction without undergoing a net change in oxidation state. In this case, sodium is shown as converting to Na+ (sodium ion), which indicates a chemical change and consumption of sodium, so describing it as a catalyst is incorrect.
Option 2: 'Sodium is reduced' — Reduction implies a gain of electrons and a decrease in oxidation state. Here, sodium starts as Na (oxidation state 0) and ends as Na+ (oxidation state +1). This is an increase in oxidation state, not a decrease, so reduction is the wrong characterization.
Option 3: 'Sodium is oxidized' — Oxidation means loss of electrons and an increase in oxidation state. In the given reaction, sodium loses an electron to become Na+, changing from 0 to +1. This fits the definition of oxidation, so this option accurately describes what happens to sodium.
To connect with the electron bookkeeping: Na → Na+ + e− shows Na losing an electron, while Cl gains that electron to become Cl−. The overall process is an electron transfer from sodium to chlorine, which is the hallmark of oxidation of the reducing agent (sodium) and reduction of the oxidizing agent (chlorine).
In summary, option 1 mislabels the role of Na, option 2 contradicts the observed increase in oxidation state, and option 3 correctly describes the oxidation of sodium in this redox process.

Question at position 28 In the reaction below, what happens to sodium (Na)? Na + Cl --> Na+ + Cl-Sodium is a catalystSodium is reducedSodium is oxidized

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