What is the chemical formula for cobalt (II) hydrogen carbonate?
The chemical formula for cobalt(II) hydrogen carbonate is
The name tells you that this is an ionic compound, made of cobalt(II) ions and hydrogen carbonate ions.
The symbol for the cobalt(II) ion is
The symbol for the hydrogen carbonate ion is
So, the formula contains
We need two "-" charges to balance the "2+" charges on the
Thus, we need two hydrogen carbonate ions, so we enclose the formula in parentheses followed by a subscript 2.
The formula is