Interpretation: The correct statement for the reaction between barium and oxygen needs to be identified.
Concept Introduction: An ionic compound is formed when a metal reacts with a non-metal. Here, metal is electron efficient and thus, loses electrons and non-metal is electron deficient thus, it gains electrons. In an ionic compound, a metal ion has a positive charge and a non-metal ion has a negative charge.
Answer to Problem 2STP
Correct answer is option (D)
Explanation of Solution
Barium and oxygen react to form an ionic compound. In this ionic compound, barium has a partial positive charge and oxygen has a partial negative charge. The formula of the compound is
Since the barium atom loses electrons it forms a cation, thus, the statement I is correct. Also, the oxygen atom gain electrons it forms an anion thus, statement II is correct. Also, ions are in a 1:1 ratio; thus, statement III is also correct.
Therefore, the correct option is (D).
In the reaction between barium and oxygen, barium forms a cation, and oxygen forms an anion. Also, due to equal charges on barium cation and oxygen anion, they combine in a 1:1 ratio. The ionic compound so formed is BaO.
Since all three statements are correct, options (A), (B), and (C) are incorrect options.
Chapter 7 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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