What happens when an acid reacts with a metal oxide?
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A.
A salt and water are formed.
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B.
Only water is formed.
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C.
A salt and hydrogen gas are formed.
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D.
Only salt is formed.
Correct Answer:
A. A salt and water are formed.
Explanation:
When an acid reacts with a metal oxide, a salt and water are produced. This chemical process is known as a neutralization reaction because metal oxides are basic in nature. During the reaction, the oxide ions from the metal oxide combine with the hydrogen ions from the acid to form water, while the remaining metal ions and acid anions join to form a salt. A common example of this is the reaction between copper(II) oxide and hydrochloric acid, which results in the formation of copper(II) chloride and water. This principle is summarized by the general word equation: Metal Oxide + Acid → Salt + Water.
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