Why is tert. butyl chloride being washed with aqueous sodium hydrogen carbonate
Please I need answers
See my response directly above to Fidelis.
Why was the tert. Butyl chloride washed with aqueous sodium hydrogen carbonate? What gas was evolved during the washing? Write a balance equation.
to neutralise
I need answers
Tert-butyl chloride (also known as 2-chloro-2-methylpropane) is often washed with aqueous sodium hydrogen carbonate (NaHCO3) in a laboratory setting to remove any remaining acid impurities.
The process of washing with aqueous sodium hydrogen carbonate can help neutralize any acidic impurities in the tert-butyl chloride. Here's how it works:
1. Acidic impurities: Tert-butyl chloride is prone to the formation of acidic impurities during its synthesis, such as hydrochloric acid or sulfuric acid. These impurities can be undesirable and may affect the desired chemical reactions or cause other side reactions.
2. Acid-base reaction: Aqueous sodium hydrogen carbonate (NaHCO3), also known as baking soda, is a weak base. When it comes into contact with acidic impurities, a neutralization reaction occurs.
H+ (from the acidic impurities) + HCO3- (from aqueous sodium hydrogen carbonate) → H2O + CO2 (gas)
The hydrogen ions (H+) from the acidic impurities react with the bicarbonate ions (HCO3-) from the sodium hydrogen carbonate, resulting in the formation of water (H2O) and carbon dioxide (CO2) gas.
3. Removal of impurities: The evolved carbon dioxide gas bubbles out of the solution, while the neutralized impurities remain in the aqueous layer. This allows the acidic impurities to be separated and removed from the tert-butyl chloride.
4. Washing procedure: To wash tert-butyl chloride with aqueous sodium hydrogen carbonate, the two liquids are typically combined in a separatory funnel or a similar apparatus. The funnel is then gently swirled to facilitate the mixing of the two phases. After a few moments, the pressure built up from the evolved carbon dioxide gas is released by carefully opening the stopcock or venting the system. The organic (tert-butyl chloride) and aqueous layers are then allowed to separate, and the aqueous layer containing the removed impurities is discarded.
By washing tert-butyl chloride with aqueous sodium hydrogen carbonate, any remaining acidic impurities can be removed, resulting in a purer product that is more suitable for subsequent chemical reactions or analysis.