Question

which is the correct order of ease of carbon dioxide production by heating the group II metal carbonates?​

Answer 1

Which is the correct order of ease of carbon dioxide production by heating the group II metal carbonates?​

A) $BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}$

B) $MgCO_{3} > CaCO_{3} > SrCO_{3} > BaCO_{3}$

C) $CaCO_{3} > MgCO_{3} > BaCO_{3} > SrCO_{3}$

D) $SrCO_{3} > BaCO_{3} > CaCO_{3} > MgCO_{3}$

Answer:

Explanation:

The correct option is A:

$BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}$

On the periodic table, carbonates required stronger heating as one does down the groupings in order for them to decompose. The implication is that  the stability of compounds will increase from $MgCO_{3}$ to $BaCO_{3}$ ​.  

 

So the carbonates will be stable according to the following order:

$BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}$, thus making B the correct answer.

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