Consider the following ions. For the positive ions listed,...

Consider the following ions. For the positive ions listed, predict the formula of the simplest compound that would be expected to be formed between the given ion and the sulfide ion, $S^{2-}$. For the negative ions listed, predict the formula of the simplest compound that would be expected to be formed between the given ion and the aluminum ion, $\mathrm{Al}^{3+}$. a. $\mathrm{Fe}^{3+}$ b. $\mathrm{Fe}^{2+}$ c. $\mathrm{O}^{2-}$ d. $I^{-}$ e. $R b^{+}$ f. $P^{3-}$ g. $\mathrm{Mn}^{2+}$ h. $S n^{4+}$

Consider the following ions. For the positive ions listed, predict the formula of the simplest compound that would be expected to be formed between the given ion and the sulfide ion, $S^{2-}$. For the negative ions listed, predict the formula of the simplest compound that would be expected to be formed between the given ion and the aluminum ion, $\mathrm{Al}^{3+}$.
a. $\mathrm{Fe}^{3+}$
b. $\mathrm{Fe}^{2+}$
c. $\mathrm{O}^{2-}$
d. $I^{-}$
e. $R b^{+}$
f. $P^{3-}$
g. $\mathrm{Mn}^{2+}$
h. $S n^{4+}$

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Key Concepts

Empirical Formula Determination

The simplest formula of an ionic compound is achieved by using the smallest whole number ratio of ions that yields an electrically neutral compound. This process involves calculating the least common multiple of the ionic charges and linking the ions accordingly.

Stoichiometry in Ionic Compounds

Understanding the stoichiometry involves calculating the relative numbers of cations and anions required for a neutral compound. It requires careful attention to the magnitude of the ionic charges so that the final compound can be represented with the correct subscript ratios.

Ionic Bonding

Ionic bonding involves the attraction between oppositely charged ions. In these compounds, electrons are transferred from one atom (or ion) to another, resulting in the formation of cations (positively charged) and anions (negatively charged) which then attract each other electrostatically.

Charge Neutrality

Every stable ionic compound must have a net charge of zero. This principle forces the overall positive and negative charges in the compound to balance. When determining the formula, the total positive charge must equal the total negative charge, ensuring electrical neutrality.

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