Aqueous sodium bicarbonate was used to wash the crude t-pently chloride. What was the purpose of the wash? give equations.
What did you use to prepare the pentyl chloride. An acid. The NaHCO3 was to neutralize the excess acid.
The purpose of washing the crude t-pentyl chloride with aqueous sodium bicarbonate is to remove any acidic impurities present in the crude product.
When t-pentyl chloride is prepared, it is often contaminated with traces of acids such as hydrochloric acid (HCl) or sulfuric acid (H2SO4) in the reaction mixture. These acidic impurities can be harmful if carried over into subsequent reactions.
Sodium bicarbonate (NaHCO3), also known as baking soda, is used for the wash because it can neutralize acidic impurities. The reaction between sodium bicarbonate and the acidic impurities produces carbon dioxide gas (CO2) and water (H2O). The balanced equations for the reaction with hydrochloric acid and sulfuric acid are:
1. Reaction with hydrochloric acid (HCl):
HCl + NaHCO3 -> CO2 + NaCl + H2O
2. Reaction with sulfuric acid (H2SO4):
H2SO4 + 2NaHCO3 -> CO2 + Na2SO4 + 2H2O
The carbon dioxide gas produced during the reaction can often be seen as effervescence or bubbling. After washing the crude t-pentyl chloride with aqueous sodium bicarbonate, the resulting solution is usually separated from the organic product (t-pentyl chloride) and discarded, as it contains the neutralized acidic impurities.