A chromium(III)ion forms a complex ion with two ammonia molecules and four thiocyanate ions.What is the formula of the complex ion? A)[Cr(NH₃)₂(NCS)₄]³⁺ B)[Cr(NH₄)₂(NCS)₄]⁺ C)[Cr(NH₃)₂(NCS)₄]^- D)[Cr(NH₃)₂(NCS)₄]^4-

Question

Quizplus · Accepted Answer

The chromium(III) ion has a +3 charge. Each thiocyanate ion (NCS) has a -1 charge, and there are four of them, contributing a total of -4 charge. The two ammonia molecules are neutral. Therefore, the overall charge of the complex ion is -1.

A Chromium(III)ion Forms a Complex Ion with Two Ammonia Molecules