alleryIUPAC name for [Co(NH₃)₅Cl]Cl₂:
APentaamminechloridocobalt(III) chloride
BHexaamminecobalt(II)
CCobalt chloride
DPentachloridocobalt
Answer & Solution
Correct answer: A. Pentaamminechloridocobalt(III) chloride
**Inside brackets:** 5 NH₃ (pentaammine) + 1 Cl (chlorido) on Co.
**Co oxidation state:** 5(0) + (-1) + (+3) = +2 charge on cation, balanced by 2 Cl⁻ outside.
Co = +3. Name: pentaamminechloridocobalt(III) chloride.
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