Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2

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Question: Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)

Options:

Correct Answer: It is octahedral

Exam Year: 2023

Solution:

The complex [Cr(NH3)6]3+ is octahedral with a coordination number of 6, as it is surrounded by six ammonia ligands.

Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)

Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)

Step 1: Identify the complex given in the question, which is [Cr(NH3)6]3+. This means it contains chromium (Cr) and six ammonia (NH3) molecules.
Step 2: Understand what coordination number means. The coordination number is the number of ligands (molecules or ions that surround a central metal atom) attached to the central metal atom.
Step 3: Count the number of ammonia ligands in the complex. There are six NH3 ligands attached to the chromium.
Step 4: Conclude that the coordination number of the complex is 6 because there are six ligands.
Step 5: Determine the geometry of the complex. A coordination number of 6 typically results in an octahedral shape.
Step 6: Summarize that the complex [Cr(NH3)6]3+ is octahedral and has a coordination number of 6.

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