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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/names-and-formulas-of-ionic-compounds/v/naming-ionic-compound-with-polyvalent-ion Want to explore more? Check out the full Chemical bonding playlist here: https://youtube.com/playlist?list=PLSQl0a2vh4HAYCvTHhMGsNvLS-btVPXRw&si=Jn-BzFI984pKGlTf Naming ionic compounds that contain polyvalent ions, using example of cobalt (III) sulfide. Sections: 00:00 - Naming ionic compounds 00:16 - Identifying cation and anion 00:26 - D-block metals and variable charges 00:55 - Determining sulfide ion charge 01:34 - Calculating cobalt ion charge 02:27 - Naming as cobalt (III) sulfide 03:09 - Why use Roman numerals in naming 03:27 - Polyvalent metals and naming rules ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
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