Final answer:
The reaction that does not proceed far to the right is CO2 + H2O ⇌ H2CO3, as it is a reversible reaction where the formation of carbonic acid is limited and easily reversible.
Step-by-step explanation:
The question asks which reaction does not proceed far to the right, meaning it does not heavily favor the product side in a chemical equilibrium. Looking at the options provided:
- HCl + NaOH → NaCl + H2O (a strong acid and a strong base react to form water and salt, this reaction goes to completion and does not establish an equilibrium)
- N2 + 3H2 → 2NH3 (this is the Haber process, which is reversible and does not go to completion under standard conditions)
- CO2 + H2O ⇌ H2CO3 (carbon dioxide and water are in equilibrium with carbonic acid, this reaction is an example of an equilibrium that does not lie far to the right)
- 2H2O2 → 2H2O + O2 (hydrogen peroxide decomposes to water and oxygen; under certain conditions, it can go substantially to the right)
Therefore, the reaction among the options provided that does not proceed far to the right is the equilibrium reaction CO2 + H2O ⇌ H2CO3. In this reaction, carbon dioxide dissolves in water to form a weak acid, carbonic acid, but the reaction is easily reversible, and the concentration of carbonic acid in water is generally low due to this reversibility.