Final answer:
The stock name for chromic ion is chromium(III) ion
This correct answer is c.
Step-by-step explanation:
The Stock name for ions involving chromium is based on the oxidation state of the chromium atom.
Chromium can exist in several oxidation states, and the Stock system provides a systematic way to represent these states using Roman numerals.
In the case of the chromic ion, the oxidation state of chromium is +3. Therefore, the Stock name for the chromic ion is "chromium(III) ion." The Roman numeral III in parentheses indicates the +3 oxidation state.
To break down the options provided:
a. chromium(I) ion - This would imply an oxidation state of +1, but chromium is not commonly found in the +1 oxidation state in stable compounds.
b. chromium(II) ion - This would imply an oxidation state of +2, but again, chromium(II) is not a common oxidation state for stable compounds.
c. chromium(III) ion - Correct, as explained above.
d. chromium(IV) ion - This would imply an oxidation state of +4, which is less common than the +3 oxidation state for stable compounds of chromium.
So, the correct choice for the stock name of the chromic ion is c. chromium(III) ion.
This correct answer is c.