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When balancing a redox equation in a basic medium, we often need to add OH⁻ ions or an OH⁻/H₂O pair to fully balance it. In this video, we’ll walk through the reaction process between ClO⁻ and Cr(OH)₄⁻ in a basic solution step by step. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning interface that allows learners to study at their own pace, in school or at home. We cover math, science, computer science, economics, and more. Our math lessons take students from preschool to college, step by step, using cutting-edge, adaptive technology that identifies each student’s learning gaps and strengths. Free. For everyone. Forever. #YouCanLearnEverything Subscribe to the Khan Academy French channel: / @khanacademyfrancais Find thousands of other 100% free videos and interactive exercises on http://fr.khanacademy.org Video under CC-BY-SA license.