Question

Why is LiF almost insoluble in water whereas LiCl in soluble not only in water but also in acetone?

Solution

LiF is almost insoluble in water because of much higher lattice energy than that of LiCl. Since Li⁺ ion (small size) can polarise bigger Cl^- ion more easily than the smaller F^- ion, therefore, according to Fajan rules, LiCl has more covalent character than LiF and hence LiCl is soluble in the organic solvents like acetone.

Some More Questions From The s-Block Elements Chapter

Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?

What is the nature of lithium compounds?

Group 1 elements are called alkali metals. Why?

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The S-Block Elements

Why is LiF almost insoluble in water whereas LiCl in soluble not only in water but also in acetone?

Some More Questions From The s-Block Elements Chapter

Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?

What is the nature of lithium compounds?

Group 1 elements are called alkali metals. Why?

Why caesium can be used in photoelectric cell while lithium can not be?

In aqueous solution, Li⁺ ion has lowest mobility. Why?

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M²⁺ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

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NCERT Sample Papers

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For Daily Free Study Material Join wiredfaculty

The S-Block Elements

Why is LiF almost insoluble in water whereas LiCl in soluble not only in water but also in acetone?

Some More Questions From The s-Block Elements Chapter

Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?

What is the nature of lithium compounds?

Group 1 elements are called alkali metals. Why?

Why caesium can be used in photoelectric cell while lithium can not be?

In aqueous solution, Li+ ion has lowest mobility. Why?

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M2+ ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

In aqueous solution, Li⁺ ion has lowest mobility. Why?

Why alkali metals do not form M²⁺ions?