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Question 21 (4 marks) (a) Write a balanced chemical equation, using structural formulae, for the formation of ethyl butanoate - HSC - SSCE Chemistry - Question 21 - 2012 - Paper 1
Question 21
Question 21 (4 marks) (a) Write a balanced chemical equation, using structural formulae, for the formation of ethyl butanoate. (b) Common safety precautions in sch... show full transcript
Worked Solution & Example Answer:Question 21 (4 marks) (a) Write a balanced chemical equation, using structural formulae, for the formation of ethyl butanoate - HSC - SSCE Chemistry - Question 21 - 2012 - Paper 1
Step 1
Write a balanced chemical equation, using structural formulae, for the formation of ethyl butanoate.
Answer
To formulate ethyl butanoate, we start by identifying the reactants involved in this esterification process. The reaction involves ethanoic acid and butanol. The balanced chemical equation is:
ightarrow ext{C}_5 ext{H}_{10} ext{O}_2 + ext{H}_2 ext{O}$$ Visually, this can be represented as: ``` O H || | CH3-C-OH + CH3-CH2-CH2-OH → CH3-C-O-CH2-CH2-CH2 + H2O ``` Here, CH₃COOH represents ethanoic acid, and C₃H₇OH represents butanol. The product, C₅H₁₀O₂, is ethyl butanoate.Step 2
Justify the use of another safety precaution specifically required to safely make ethyl butanoate.
Answer
In addition to wearing safety glasses, gloves, and lab coats, an essential safety precaution when making ethyl butanoate through the esterification process involves implementing proper ventilation or using a fume hood. This is crucial because the reaction can produce volatile compounds that may be harmful if inhaled. Ensuring good airflow minimizes the risk of vapor accumulation, thereby protecting individuals from inhalation hazards. Furthermore, it is important to keep a fire extinguisher readily available, as the chemicals involved may be flammable. In general laboratory settings, using such safety measures is vital to prevent accidents and ensure a safe working environment.