[问答题]
Ethanoic acid has a boiling point of 118$^{\circ}$ and is soluble in water.
The structural formula of ethanoic acid is shown.
1.State the strongest type of intermolecular interaction formed by ethanoic acid.
2.The condensed structural formulas of two other organic compounds, A and B, are shown.
1.Explain why the boiling points of A and B differ from that of ethanoic acid.
2.Suggest why the boiling points of A and B are different.
3.Explain why A and B are not soluble in water.
3.When ethanoic acid dissolves in water, it reacts to form an ethanoate ion. The structural formula of the ethanoate ion is shown.
1.Write an equation showing the resonance in the ethanoate ion. Include in it, the structural formulas for the two resonance structures, showing all formal charges and non-bonding electron pairs.
2.Explain how the dissolution of ethanoic acid in water affects the electrical conductivity of the liquid.
