Iron atom is oxidized or you can say it loses 2 electrons.
Answer:

Explanation:
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In this case, when acetic acid is titrated with sodium hydroxide, the following chemical reaction is carried out:

Whereas there is a 1:1 mole ratio between the acid and the base, which means that at the equivalence point we evidence:

Which in terms of volumes and concentrations is written as:

Thus, solving for the required volume of base, we obtain:

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Answer:
Hydrochloric acid + sodium hydroxide -> sodium chloride + water
Sulphuric acid + copper hydroxide -> copper sulphate + water
Nitric acid + sodium hydroxide -> sodium nitrate + water
Hydrochloric acid + calcium hydroxide -> calcium chloride + water
Sulphuric acid + potassium hydroxide -> potassium sulphate + water
Hydrochloric acid + lithium hydroxide -> lithium chloride + water
Nitric acid + magnesium hydroxide -> magnesium nitrate + water