What is the chemical formula for Cobalt(II) Hydrogen Carbonate?

The ionic composition cobalt (II) hydrogen carbonate is sometimes known as cobalt bicarbonate since the prefix "bi-" really denotes a hydrogen ion. The metal's oxidation state in that compound is often indicated by the number in the bracket. Sodium bicarbonate is typically used to treat cobaltous sulphate in order to prepare it.

The provided compound cobalt (II) hydrogen carbonate is made up of a metal called cobalt and a group of non-metals called hydrogen carbonate, as the name implies. We are aware that an ionic compound is one that consists of a metal and a non-metal. When analysing ionic compounds, it is important to consider the charges of all the constituent components. Let's now determine the chemical equation for the specified substance, cobalt (II) hydrogen carbonate.

We'll utilise a table of names for the typical polyatomic ions along with the Periodic Table since cobalt (II) hydrogen carbonate has a polyatomic ion, or group of non-metals (hydrogen carbonate in this case) following the metal. The following are the guidelines for writing a ternary ionic compound's formula:
1. Record the metal's symbol and charge using the periodic table as reference.

Co(HCO₃)₂ is the chemical formula for cobalt(II) hydrogen carbonate.

Reason: As implied by the name, this substance is an ionic compound made up of cobalt(II) and hydrogen carbonate ions.
Co ²⁺ is the symbol for the cobalt(II) ion.

You remember the polyatomic ion formulae, right? If so, the symbol for the hydrogen carbonate ion is HCO₃.
Consequently, the formula includes Co²⁺ and HCO₃.

To counteract the "2+" charges on the Company, we need two "-" charges.
Since we require two hydrogen carbonate ions, we parenthesize the formula and add the subscript 2.

Therefore, the chemical formula will be $\mathrm{Co}{\left({\mathrm{HCO}}_3\right)}_2$.

Hence, option C is correct.