Identify the correct formula of halides of alkaline earth metals from the following .
(a) $B a C l_{2} . 2 H_{2} O$ (b) $B a C l_{2}$ (c) $C a C l_{2} . 6 h_{2} O$ (d) $S r C l_{2} . 4 H_{2} O$

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Solution

Answer: (c) $C a C l_{2} . 6 H_{2} O$

All the chlorides of alkaline earth metals are hydrated to a different extent and extent of hydration decreases from Mg to Ba e.g,

$M g C l_{2} . 8 H_{2} O C a C l_{2} . 6 H_{2} O S r C l_{2} .6 H_{2} O B a C l_{2} . 2 H_{2} O .$

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Similar questions

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

B e C l_{2} < M g C l_{2} < C a C l_{2} < S r C l_{2} < B a C l_{2} < R a C l_{2}

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

M g C l_{2} \cdot 6 H_{2} O, C a C l_{2} \cdot 6 H_{2} O, B a C l_{2} \cdot 2 H_{2} O

S r C l_{2} \cdot 2 H_{2} O

Halides of alkaline earth metals form hydrates such as MgCl₂.6H₂O,CaCl₂.6H₂O, BaCl₂.2H₂O and SrCl₂.2H₂O. This shows that halides of group 2 elements

M g C l_{2} .6 H_{2} O

C a C l_{2} .6 H_{2} O

B a C l_{2} .2 H_{2} O

S r C l_{2} .2 H_{2} O

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