Question

Antacids are used to neutralize excessive hydrochloric acid (HCl) that may be present in the stomach during digestive process. Milk of Magnesia is a common over the counter medication used to neutralize the HCI excess, the base present in Milk of Magnesia is called magnesium hydroxide (Mg(OH)_2). Tell which of the compounds (HCI or Mg(OH)_2) is an ionic compound, and which compound is a covalent compound. Next, explain in a very clear way how you conclude which compound is ionic and which compound is covalent. Draw the Lewis structure for the compound you told is the covalent compound in part a). You should write all dots in the structure to receive full credit for this item. Write the balanced chemical equation for the neutralization reaction between HCI and Mg(OH)_2.

Answer 1

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Answer: a) c compound: in covalent compounds atoms are bonded through covalent bond formed by sharing of electrons and bonded atoms have very small or 0 electronegativity difference Covalent bond betw een atoms with small elecyronegativity difference is called as polar covalent bond. e.g. H-Cl compound. Bond between H and Cl is polar covalent bond. 2) lonic compounds Atoms are bonded through electrostatic attraction between ions i.e. Cation and anion. There is complete transfer of electron from one atom to anathor. Donor atom gives cation and acceptor gives an anion. e.g. Mg(OH)2 Answer. b) HCi is a polar covalent compound and it's Lewis dot structure is H· . Cl· , Answ er c) A balanced neutralization reaction between HCI and 2 HCI (aq.) Hydrochloric acid Mg(OH)2 Magnesium hydroxide MgCl2 (aq.) 2H20 Magnesium chloride