In what ways lithium shows similarities to magnesium in its chemical behaviour?

Asked by Pragya Singh | 1 year ago |  42

1 Answer

Solution :-

Similarities between lithium and magnesium:

(i) lithium and magnesium react slow with cold water.

 

(ii) oxides of lithium and magnesium are less soluble in H2O. also the hydroxides of both decompose at high temperature.

\( 2LiOH \rightarrow Li_{2}O+H_{2} \)

\( Mg(OH)_{2}\rightarrow MgO+H_{2}\)

 

(iii)  Nitrides is formed from both the lithium and magnesium when they react with N2.

\( 6Li+N_{2}\rightarrow 2Li_{3}\)

\( 3Mg+N_{2}\rightarrow Mg_{3}N_{2} \)

 

(iv) Neither Li nor Mg form superoxides  or peroxides.

 

(v) Both the carbonates of lithium and magnesium are naturally covalent. They decomposes on heating.

\( Li_{2}CO_{3}\rightarrow Li_{2}O+CO_{2} \)

\( MgCO_{3}\rightarrow MgO+CO_{2} \)

 

(vi) They do not form bicarbonates which are solid.

 

(vii) Both MgCl2 and LiCl are soluble in ethanol because they are naturally covalent.

 

(viii) Both MgCl2 and LiCl are naturally deliquescent. They crystallize as hydrates from aqueous solutions. Eg.,

\( LiCl.2H_{2}O\; and \;MgCl_{2}.8H_{2}O\)

Answered by Abhisek | 1 year ago

Related Questions

Which one of the alkaline earth metal carbonates is thermally the most stable?

(a) MgCO3  

(b) CaCO3  

(c) SrCO

(d) BaCO3

Class 11 Chemistry The s Block Elements View Answer

Which one of the following alkali metals gives hydrated salts?

(a) Li  

(b) Na  

(c) K  

(d) Cs

Class 11 Chemistry The s Block Elements View Answer

Which of the following alkali metals has the least melting point?

(a) Na  

(b) K  

(c) Rb  

(d) Cs

Class 11 Chemistry The s Block Elements View Answer

How would you explain the following observations?

(i) BeO is almost insoluble but BeSO4 is insoluble in water.

(ii) BaO is soluble but BaSO4 is insoluble in water.

(iii) LiI is more soluble than KI in ethanol.

Class 11 Chemistry The s Block Elements View Answer

Write balanced equations for reactions between:

(a) Na2O2 and water

(b) KOand Water

(c) Na2O and CO2

Class 11 Chemistry The s Block Elements View Answer