Answer to Question #140769 in General Chemistry for Kali

Question

Problem 8.51 part B in the Mastering Chemistry homework set for chapter 8 asks "Assign oxidation numbers to each of the atoms O, C, S in OCS." Chapter 4 section 4 of the textbook outlines the rules for assigning oxidation numbers to atoms in a molecule. The answer that will receive full credit to the question in the Mastering Chemistry homework is O is -2, C is +2, and S is 0 (remember this when you are doing the homework set for chapter 8). However, if you look up the answer to problem 8.51 in the back of the textbook it will say that the answer is O is -2, C is +4, and S is -2. Additionally, if you google oxidation numbers for OCS you will find multiple sites also stating the answer is O is -2, C is +4, and S is -2. Explain why the correct answer from Mastering Chemistry is O is -2, C is +2, and S is 0 using the concept of electronegativity from chapters 7 and 8. Use the rubric to guide your response.

Answer 1

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