Which of the following represents the chemical formula of Calcium Carbonate?

$C a {C O}_{3}$ .

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

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

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

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Solution

The correct option is A
$C a {C O}_{3}$ .

The given compound contains ions as its constituents.

The Calcium ion is $C a^{2 +}$ and has a valency +2.

The Carbonate ion has the formula ${C O}_{3}^{- 2}$ and has a valency -2.

By crossing over the valencies and balancing charge,

we get the formula as $C a {C O}_{3}$ .

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Similar questions

Write the chemical formulae of the following:

(a) Magnesium chloride

(b) Calcium oxide

(d) Aluminium chloride

(e) Calcium carbonate

(a)

(b)

(c)

(d)

(e)

C a (H C O_{3})_{2}

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