Which of the following compounds has the least ionic character?
A - Scottish Highers Chemistry - Question 1 - 2023
Question 1
Which of the following compounds has the least ionic character?
A. Sodium iodide
B. Sodium fluoride
C. Potassium iodide
D. Potassium fluoride
Worked Solution & Example Answer:Which of the following compounds has the least ionic character?
A - Scottish Highers Chemistry - Question 1 - 2023
Step 1
Identify the compounds
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Answer
The compounds listed are:
A. Sodium iodide (NaI)
B. Sodium fluoride (NaF)
C. Potassium iodide (KI)
D. Potassium fluoride (KF)
Step 2
Compare ionic character
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Answer
Ionic character can be analyzed based on the electronegativity difference between the atoms. Generally, a larger difference indicates higher ionic character.
Sodium iodide: Na has an electronegativity of 0.93 and I is 2.66, difference = 1.73.
Sodium fluoride: Na (0.93) and F (3.98), difference = 3.05.
Potassium iodide: K (0.82) and I (2.66), difference = 1.84.
Potassium fluoride: K (0.82) and F (3.98), difference = 3.16.
Step 3
Determine the least ionic character
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Answer
Based on the electronegativity differences, sodium iodide exhibits the smallest difference (1.73). Therefore, it has the least ionic character among the given compounds.
Step 4
Final answer
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Answer
The compound with the least ionic character is A. Sodium iodide.
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