Identify \('X'\) along with oxidation state of halogen in the given reaction:
\(3Cl_2 + 6NaOH \longrightarrow 5NaCl + X + 3H_2O\) (hot and conc.)
Answer & explanation
Correct answer: option 2
The correct answer is option 2. \(NaClO_3\), +5.
Let us break down the explanation step by step:
1. Understanding the Reaction:
The given reaction is a disproportionation reaction of chlorine (\(Cl_2\)) in the presence of hot and concentrated sodium hydroxide (\(NaOH\)):
\[ 3Cl_2 + 6NaOH \longrightarrow 5NaCl + X + 3H_2O \]
2. Identification of \(X\):
In the reaction, chlorine (\(Cl_2\)) is both oxidized and reduced simultaneously. It is oxidized to form a compound represented by \(X\) and reduced to form sodium chloride (\(NaCl\)). We need to identify \(X\) and determine its composition.
3. Possible Chlorine Compounds:
Chlorine can exhibit various oxidation states, including -1, +1, +3, +5, and +7. To find \(X\), we need to consider compounds where chlorine has a positive oxidation state.
4. Oxidation States of Chlorine:
\(NaClO_2\): In this compound, chlorine has an oxidation state of +3.
\(NaClO_3\): In this compound, chlorine has an oxidation state of +5.
\(NaClO_2\): In this compound, chlorine has an oxidation state of +7.
\(NaClO_3\): In this compound, chlorine has an oxidation state of +1.
5. Selection of Correct Option:
Since the given reaction involves the formation of a compound (\(X\)) where chlorine is oxidized, and the options provide compounds with different oxidation states of chlorine, we need to choose the compound where chlorine has an oxidation state of +5. This corresponds to option (2) \(NaClO_3\).
Therefore, \(X\) in the reaction is \(NaClO_3\), and the oxidation state of chlorine in \(NaClO_3\) is +5. This compound is formed during the disproportionation of chlorine in hot and concentrated sodium hydroxide solution.