Which of the following compounds has the greatest tonic character?
A - Scottish Highers Chemistry - Question 3 - 2016
Question 3
Which of the following compounds has the greatest tonic character?
A. Caesium fluoride
B. Caesium iodide
C. Sodium fluoride
D. Sodium iodide
Worked Solution & Example Answer:Which of the following compounds has the greatest tonic character?
A - Scottish Highers Chemistry - Question 3 - 2016
Step 1
Identify Ionic Character
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Answer
Ionic character is determined by the difference in electronegativity between the two atoms in the compound. The larger the difference, the greater the ionic character.
Step 2
Evaluate Each Compound
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Answer
Caesium Fluoride: Caesium (Cs) and Fluorine (F) have a large electronegativity difference.
Caesium Iodide: Caesium (Cs) and Iodine (I) have a smaller difference than Cs and F, leading to lower ionic character.
Sodium Fluoride: Sodium (Na) and Fluorine (F) also have a significant electronegativity difference, but less than CsF.
Sodium Iodide: Sodium and Iodine have the smallest electronegativity difference among these options.
Step 3
Conclusion
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Answer
Based on the analysis, Caesium fluoride has the greatest ionic character due to the highest electronegativity difference.
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