The correct Roman numeral for the chromium ion in the compound CrCl₃ is A)I B)II C)III D)IV

Question

Quizplus · Accepted Answer

The Roman numeral in the compound indicates the charge on the metal ion. From the compound, we can see that there are three chloride ions (Cl-), one sulfate ion (SO42-), and two unidentified anions (₃). Since the total negative charge is -6 and the compound is neutral, the chromium ion (Cr) must have a charge of +6 to balance it out. This corresponds to the Roman numeral III.

The Correct Roman Numeral for the Chromium Ion in the Compound