WAEC Chemistry 2014 Theory — Question 25
Question 25 of 38 from the West African Examinations Council (WAEC) Chemistry 2014 Theory paper, with the correct answer and a full explanation.
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3(b)(ii). State the function of H₂SO₄ in each of the reactions: I. C₂H₅OH→C₂H₄; II. MgO+H₂SO₄→MgSO₄+H₂O; III. C+conc.H₂SO₄→CO₂+SO₂+H₂O
Model answer
I. H₂SO₄ serves as a dehydrating agent (in the dehydration of ethanol to ethene). II. H₂SO₄ serves as a typical acid here (acid-base neutralization reaction). III. H₂SO₄ serves as an oxidizing agent (oxidizing carbon to CO₂).
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