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

Asked by Pragya Singh | 1 year ago |  42

##### 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

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