The structural formula of compound P is \(\mathrm{CH_3CH_2COOCH_2CH_3}\).
P can be formed by reacting together two organic compounds in the presence of a suitable catalyst.
Which pair of compounds could react together to produce P?
Correct Answer: \( \boxed{\mathrm{C}} \)
Compound P is an ester, \(\mathrm{CH_3CH_2COOCH_2CH_3}\), called ethyl propanoate.
It is formed by esterification between:
The reaction is:
\(\mathrm{CH_3CH_2COOH+CH_3CH_2OH\rightleftharpoons CH_3CH_2COOCH_2CH_3+H_2O}\)
Therefore, the correct answer is (C).
Which compound is a product of the hydrolysis of \(\mathrm{CH_3CO_2CH_2CH_3}\) using aqueous sodium hydroxide?
Correct Answer: \( \boxed{\mathrm{A}} \)
Ethyl ethanoate undergoes alkaline hydrolysis (saponification):
\(\mathrm{CH_3CO_2CH_2CH_3+NaOH\rightarrow CH_3CO_2^-Na^++CH_3CH_2OH}\)
The products are sodium ethanoate and ethanol.
Therefore, the correct answer is (A).
The table shows the reagents and products of three reactions.
| Reactants | Products | |
|---|---|---|
| 1 | Ethanoic acid + \(\mathrm{Na_2CO_3}\) | \(\mathrm{CH_3CO_2Na+H_2O+CO_2}\) |
| 2 | Ethanoic acid + Mg | \(\mathrm{(CH_3CO_2)_2Mg+H_2O}\) |
| 3 | Ethanoic acid + \(\mathrm{CH_3OH}\) | \(\mathrm{CH_3CO_2CH_3+H_2O}\) |
Which rows are correct?
Correct Answer: \( \boxed{\mathrm{C}} \)
Row 1 is correct because acids react with carbonates to produce a salt, water and carbon dioxide.
Row 2 is incorrect because magnesium reacts with ethanoic acid to produce hydrogen gas, not water:
\(\mathrm{2CH_3CO_2H+Mg\rightarrow (CH_3CO_2)_2Mg+H_2}\)
Row 3 is correct because methanol and ethanoic acid undergo esterification to form methyl ethanoate and water.
Therefore, the correct answer is (C).
