Question

calcium carbonate react with potassium iodine write chemical equation and then balance them

Answer 1

Balanced Equation :

CaCO3 + 2KI = CaI2 + K2CO3

Product formed :

When Calcium carbonate reacts with potassium iodide then we get potassium carbonate (potash) and calcium iodide.

This reaction is a kind of Displacement reaction .

Displacement Reactions :

Here more reactive element displaces a less reactive element present in the compound as happened in above case .

Here Calcium replaces Potassium from the compound and forms Calcium Iodide

At the same time 1 mole of potash is also formed..

Similar reactions :

• Cl2(aq) + 2NaBr→ 2NaCl + Br2(aq)
• Cu + 2AgNo3→ 2Ag + Cu(NO3)2..

More :

Calcium carbonate undergoes may other Reactions too , like

CaCO3( s ) → CaO( s ) + CO2( g ) .

Here it splits up into it's constitutes i.e Carbon monoxide and Carbon dioxide.

Similarly on reaction with acid ,

CaCO3 + 2HCl → CaCl2+ CO2 + H2O

Answer 2

Calcium carbonate + Potassium Iodide = Calcium Iodide + Potassium Carbonate

→ $\Textbf{CaCO_3 + KI = CaI_2 + K_2CO_3_}$

Balanced equation :-

$\Textbf{CaCO_3 + 2KI = CaI_2 + K_2CO_3_}$

→ It is a single displacement reaction as a more reactive metal (k) displaces low reactive metal (Ca) from it's compound.