Question

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:

Answer 1

Answer:

$CaCl_2$, CaS, $Cr Cl_4$, $CrS_2$

Explanation:

The reaction can be done by adding the cations and the anions.

The binary compounds are always formed by the two different elements.

When one calcium ion, $Ca ^{2+}$ combines with the two calcium ions, $Cl^-$, they formed a binary compound of $CaCl_2$.

When one $Ca ^{2+}$ combines with one $S^{2-}$ ion, they formed CaS binary compound.

When one chromium ion $Cr^{4+}$ combines with four ions of chlorine, $Cl ^-$, the compound formed is $Cr Cl_4$.

When 1 ion of $Cr^{4+}$ combines with 2 ions of sulphur, $S^2$, the binary compound formed is $CrS_2$.