What safety precaution is necessary for the reaction of 1-butanol as describ – [Free] B47
What safety precaution is necessary for the reaction of 1-butanol as described in the experimental procedure provided on Brightspace? Why is this safety precaution needed?
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Chemistry Safety Precaution Analysis
Question:
2B. What safety precaution is necessary for the reaction of 1-butanol as described in the experimental procedure provided on Brightspace? Why is this safety precaution needed?
Answer with Full Detailed Explanation:
Step 1: Understanding the Reaction
In the given experiment, 1-butanol is reacted with a strong base such as sodium hydride (NaH). This leads to the formation of an alkoxide and the liberation of hydrogen gas:
R–OH + NaH → R–O⁻ Na⁺ + H₂↑
This is a highly exothermic and reactive process that generates hydrogen gas (H₂) as a byproduct.
Step 2: Associated Hazard
Hydrogen gas is extremely flammable and can form explosive mixtures with air. Even a small spark or exposure to an open flame could result in a fire or explosion.
Step 3: Required Safety Precaution
To minimize the risk:
- Carry out the reaction inside a well-ventilated fume hood.
- Ensure there are no open flames, sparks, or ignition sources nearby.
- Use proper protective equipment such as lab coat, goggles, and gloves.
The fume hood serves to safely vent the hydrogen gas away from the experimenter and from any possible sources of ignition, thus maintaining a safer lab environment.
Final Answer:
The necessary safety precaution is to perform the reaction in a fume hood and keep it away from open flames or ignition sources.
This precaution is essential because the reaction produces hydrogen gas, which is highly flammable and can cause fire or explosion if not properly handled.