Question

which of the following is the correct name for bacl₂?
a. monobarium dichloride
b. barium chlorine
c. barium chloride
d. barium dichloride

Explanation:

To name ionic compounds like \( \text{BaCl}_2 \), we follow the rules for naming ionic compounds. Barium (\( \text{Ba} \)) is an alkaline earth metal with a fixed oxidation state of \( +2 \), and chlorine (\( \text{Cl} \)) forms the chloride ion (\( \text{Cl}^- \)) with a charge of \( -1 \). In ionic compound naming, we use the name of the metal (barium) followed by the name of the non - metal with its ending changed to -ide (chloride). Since barium has a fixed charge, we do not use prefixes (like mono - or di -) to indicate the number of atoms. Option A is incorrect because we don't use prefixes for metals with fixed charges. Option B is incorrect because the non - metal should be named as chloride, not chlorine. Option D is incorrect as we don't use the prefix "di" for the chloride ion when the metal has a fixed charge.

Answer:

C. Barium chloride