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Ethanoic acid is the most acidic of the three. This is because once ethanoic acid has lost a proton the negative charge can be spread over two oxygen atoms via two resonance forms. Oxygen atoms are electr...

Atoms that share electrons due to the electrostatic attraction between the negatively charged pair of electrons and positively charged nuclei.

There are two reasons: increasing atomic size and increasing shielding effect.
Increasing atomic size - As you go down the Group, the atom size becomes larger, therefore the electron that must be rem...

1a) Strong acids fully dissociate in water, whereas weak acids only partially dissociate in water - thus forming an equilibrium mixture.
1b) See diagram.

Fe²⁺ has an electron configuration of 1s²2s²2p⁶3s²3p⁶3d⁶. When the ligands of the solution bind to the metal ion the d-orbitals...