Short Answer TypeWrite two properties of lithium carbonate in which it differs from other alkali metal carbonates.
Why is LiF almost insoluble in water whereas LiCl in soluble not only in water but also in acetone?
How would you explain that the following observations?
LiI is more soluble than KI in ethanol?
Long Answer TypeExplain: Lithium exhibits anamalous behaviour in the company of alkali metals.
Or
Name the chief factor responsible for the anomalous behaviour of lithium.
Or
List three properties of lithium in which it differs from the rest of the alkali metals.
Short Answer TypeLong Answer TypeIn what ways lithium shows similarities to magnesium in its chemical behaviour?
Or
List four properties to show the diagonal relationship between lithium and magnesium.
The similarity between Li and Mg is because of their similar atomic radii (Li = 152 pm; Mg = 160 pm) and ionic radii. (Li+ = 76 pm, Mg2+ = 72 pm).
These two elements resemble each other in the following properties:
(i) Both Li and Mg decompose water very slowly with the liberation of hydrogen.
(ii) Both Li and Mg form nitrides - Li directly and Mg on burning in nitrogen.
(iii) LiOH and Mg(OH)2 are weak bases.
(iv) Nitrates of both decompose on heating to give oxides.
(v) Both LiCl and MgCl2 are soluble in ethanol.
(vi) Both LiCl and MgCl2 are deliquescent and crystalline from aqueous solution as hydrates, LiCl2. 2H2O and MgCl2.8H2O.
Short Answer Type
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