Which Option Should I Choose for the Complex Ion Based on the Given Information?

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The discussion centers on selecting the correct complex ion option based on a 0.2 mol ratio of Cl- ions to chromium ions. The options under consideration are B and D, but the user expresses uncertainty in making a choice. A participant suggests that there may not be sufficient information to definitively select between the two options. The conversation highlights the need for more data to make an informed decision regarding the complex ion. Ultimately, the conclusion is that additional information is necessary for a clear choice.
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Homework Statement


Screen Shot 2016-07-02 at 11.36.13 AM.png


Homework Equations

The Attempt at a Solution


There is 0.2 mol of Cl- ions so therefore this leaves us with a 1:1 ratio for the chloride ion to chromium ion in the complex ion. This leaves us with option B or D. However, I am not sure how to choose between them. Can someone give me some advice?

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I don't think there is enough information to choose between the two here.
 
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