Which of the following represents the chemical formula of calcium carbonate? Options: A . &nbsp C a C O 3 B . &nbsp C a 2 C O 3 C . &nbsp C a ( C O 3 ) 2 D . &nbsp C a 3 C O 2

Answer: Option A : A Calcium carbonate consist of calcium ion and carbonate ion, i.e., C a 2 + and CO 3 2 − , which have a charge of +2 and -2 respectively. Symbol Ca CO 3 Charge +2 -2 On cross-multiplication and balancing the charge, we get the formula as C a C O 3 .

Which of the following represents the chemical formula of calcium carbonate?

Discussion Forum : Atoms And Molecules

Question -

Which of the following represents the chemical formula of calcium carbonate?

Options:

A .

C a {C O}_{3}

B .

{C a}_{2} {C O}_{3}

C .

C a ({C O}_{3})_{2}

D .

{C a}_{3} C O_{2}

Answer: Option A
:
A
Calcium carbonate consist of calcium ion and carbonate ion, i.e.,

C a^{2 +}

and

{CO}_{3}_{3}^{2 -}

, which have a charge of +2 and -2 respectively.

\begin{matrix} Symbol & Ca & {CO}_{3} Charge & +2 & -2 \end{matrix}

On cross-multiplication and balancing the charge, we get the formula as $C a {C O}_{3}$ .

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