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Interpretation:
Thecorrect chemical formula should be determined
Concept introduction:
Ionic compound: Ionic compounds are formed between oppositely charged ions. Ionic bond can be expressed by electrostatic force which holds oppositely charged particles together in an ionic compound. Ionic compounds give ions in the aqueous solution.
Answer to Problem 7STP
Answer is D. The correct chemical formula for the ionic compound formed by the calcium ion (Ca2+) and acetate ion (C2H3O2-) is Ca(C2H3O2)2.
Ionic charge plays an important role in the formation of ionic compounds. Calcium has the electron configuration [Ar] 4s2, and needs to lose two electrons to attain the stable configuration of argon to form Ca2+ ion. Ca2+ ion is a bivalent cation whereas acetate ion (C2H3O2-) is monovalent one. Ca2+ion needs two acetate ions to complete its valency to make a neutral ionic compound, because the number of electrons lost and gained must be equal, two fluorine atoms are needed to accept the two electrons lost from the calcium atom.
The chemical formula of the ionic compound is Ca(C2H3O2)2.
Reasons for incorrect options:
As, Ca2+ ion is a bivalent cation whereas acetate ion (C2H3O2-) is monovalent one. Ca2+ion needs two acetate ions to complete its valency to make a neutral ionic compound.
Answer is D. The correct chemical formula for the ionic compound formed by the calcium ion (Ca2+) and acetate ion (C2H3O2-) is Ca(C2H3O2)2.
That means other options that is,
A. CaC2H3O2
B. CaC4H6O3
C. (Ca)2C2H3O2are found to be incorrect.
Explanation of Solution
Ionic charge plays an important role in the formation of ionic compounds. Calcium has the electron configuration [Ar] 4s2, and needs to lose two electrons to attain the stable configuration of argon to form Ca2+ ion. Ca2+ ion is a bivalent cation whereas acetate ion (C2H3O2-) is monovalent one. Ca2+ion needs two acetate ions to complete its valency to make a neutral ionic compound, because the number of electrons lost and gained must be equal, two fluorine atoms are needed to accept the two electrons lost from the calcium atom.
The chemical formula of the ionic compound is Ca(C2H3O2)2.
Reasons for incorrect options:
As, Ca2+ ion is a bivalent cation whereas acetate ion (C2H3O2-) is monovalent one. Ca2+ion needs two acetate ions to complete its valency to make a neutral ionic compound.
Answer is D. The correct chemical formula for the ionic compound formed by the calcium ion (Ca2+) and acetate ion (C2H3O2-) is Ca(C2H3O2)2.
That means other options that is,
A. CaC2H3O2
B. CaC4H6O3
C. (Ca)2C2H3O2are found to be incorrect.
Chapter 14 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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