Question

what is the formula of calcium carbonate by criss-cross method ​

Answer 1

Answer:

Explanation:

CaCO3

By applying criss-cross method, the formula will be CaCO3.

Answer 2

On applying the criss-cross method, the formula of calcium carbonate is $CaCO_{3}$

• In the criss-cross method, the valency of each ion is crossed over to the subscript of the other ion.
• The sign of valency is dropped in this method.
• Then the valencies are reduced to their simplest ratio.
• The valency of calcium $(Ca)=+2$
• The valency of carbonate$(CO_{3} )=-2$
• The simplest ratio between their valencies is $1:1$
• Hence, the formula is CaCO3.