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How Would You Explain the Following Observation Lii is More Soluble than Ki in Ethanol. - Chemistry

How would you explain the following observations?

LiI is more soluble than KI in ethanol.

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Solution 1

LiI is more soluble than KI in ethanol. As a result of its small size, the lithium ion has a higher polarising power than the potassium ion. It polarises the electron cloud of the iodide ion to a much greater extent than the potassium ion. This causes a greater covalent character in LiI than in KI. Hence, LiI is more soluble in ethanol.

Solution 2

Since the size of Li+ ion is very small in comparison to K+ ion, it polarises the electron cloud of I ion to a great extent. Thus Lil dissolves in ethanol more easily than the KI.

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NCERT Class 11 Chemistry Textbook
Chapter 10 The s-Block Elements
Q 29.3 | Page 306
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