No, chemists do not use structural formulas to emphasize the ratio of ions in a compound. Structural formulas are used to depict the arrangement of atoms and bonds within a molecule or compound. They show the connectivity and order of atoms, but do not explicitly indicate the ratio of ions.

To emphasize the ratio of ions in a compound, chemists use chemical formulas. Chemical formulas use symbols for elements and subscripts to indicate the number of atoms of each element present in the compound. For example, the chemical formula for sodium chloride is NaCl, indicating a 1:1 ratio of sodium and chloride ions. The ratio of ions is important in understanding the stoichiometry and properties of a compound.