https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/worked-example-using-oxidation-numbers-to-identify-oxidation-and-reduction 2022-09-05T08:18:59.810508578Z Worked example: Using oxidation numbers to identify oxidation and reduction By assigning oxidation numbers to the atoms of each element in a redox equation, we can determine which element is oxidized and which element is reduced during the reaction. In this video, we'll use this method to identify the oxidized and reduced elements in the reaction that occurs between I⁻ and MnO₄⁻ in basic solution. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/54ec28fd-7ad7-48c1-b53e-66b8b3140615_1280_720_base.png Worked example: Using oxidation numbers to identify oxidation and reduction By assigning oxidation numbers to the atoms of each element in a redox equation, we can determine which element is oxidized and which element is reduced during the reaction. In this video, we'll use this method to identify the oxidized and reduced elements in the reaction that occurs between I⁻ and MnO₄⁻ in basic solution. https://cdn.kastatic.org/ka-youtube-converted/CsgVO0ldmQs.mp4/CsgVO0ldmQs.mp4 303 Fundamentals of redox chemistry https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/practice-determining-oxidation-states 2021-07-14T12:44:36Z Practice determining oxidation states Determining oxidation numbers in magnesium oxide and magnesium hydroxide.  Sal Khan video https://cdn.kastatic.org/googleusercontent/MW-R4X2Deo4E5ThMn1kGu9xnoPywCkhf4EeBc9xc42geFHs6j5-F-lKK23rl1fQ2_N8MkrGR8DowM1zM2L5ixkBo Practice determining oxidation states Determining oxidation numbers in magnesium oxide and magnesium hydroxide.  https://cdn.kastatic.org/ka-youtube-converted/M7PnxSQedkM.mp4/M7PnxSQedkM.mp4 267 Fundamentals of redox chemistry https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/worked-example-balancing-a-simple-redox-equation 2022-10-05T02:43:18.611402953Z Worked example: Balancing a simple redox equation A redox equation can be balanced using the following stepwise procedure: (1) Divide the equation into two half-reactions. (2) Balance each half-reaction for mass and charge. (3) Equalize the number of electrons transferred in each half-reaction. (4) Add the half-reactions together. In this video, we'll use these steps to balance the redox equation for the reaction between aluminum metal and hydrogen ions. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/b60e38eb-f4b8-4180-8fd9-22c6a5d113ba_1280_720_base.png Worked example: Balancing a simple redox equation A redox equation can be balanced using the following stepwise procedure: (1) Divide the equation into two half-reactions. (2) Balance each half-reaction for mass and charge. (3) Equalize the number of electrons transferred in each half-reaction. (4) Add the half-reactions together. In this video, we'll use these steps to balance the redox equation for the reaction between aluminum metal and hydrogen ions. https://cdn.kastatic.org/ka-youtube-converted/MxjCto0BYd4.mp4/MxjCto0BYd4.mp4 431 Fundamentals of redox chemistry https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/disproportionation 2021-07-14T13:19:39Z Disproportionation Assigning oxidation states for the decomposition of hydrogen peroxide, a disproportionation reaction.  Jay video https://cdn.kastatic.org/googleusercontent/x9HDAlpkxAjl9ugE4PjpPegMvNKS5iwPM2ASCi228QpjOcYzh8QSZDCdBZ-NN7tQMaJijibdXVL8fO1Hd4LDcLLN Disproportionation Assigning oxidation states for the decomposition of hydrogen peroxide, a disproportionation reaction.  https://cdn.kastatic.org/ka-youtube-converted/PXlvKtpvUEk.mp4/PXlvKtpvUEk.mp4 303 Fundamentals of redox chemistry https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/introduction-to-oxidation-and-reduction 2021-01-04T18:35:19Z Oxidation and reduction Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction.  Sal Khan video https://cdn.kastatic.org/googleusercontent/mh5GOQqJkJQnDwGJkQVbTV9oL_BswdUL3gYs3sX0VjgftqZQTqnw5bFHOlSpVtRPuIdgtt7NlZ69E6dM0pVydClT Oxidation and reduction Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction.  https://cdn.kastatic.org/ka-youtube-converted/DvYs1HILq1g.mp4/DvYs1HILq1g.mp4 664 Fundamentals of redox chemistry https://www.khanacademy.org/science/grade-9-chemistry-snc-aligned/x22d5b83c2ea2dc38:electrochemistry/x22d5b83c2ea2dc38:redox-reactions/v/oxidation-and-reduction-conventional-definition-pk 2025-12-18T18:40:53.641757593Z Oxidation and reduction (Conventional definition) Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Oxidation and reduction (Conventional definition) Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/RfNvalXjQx4.mp4/RfNvalXjQx4.mp4 609 Fundamentals of redox chemistry https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:electrochemistry/x203b0fc81a964b2d:redox-reactions/v/redox-reaction-pk 2025-12-18T18:40:53.641757593Z Redox reaction Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Redox reaction Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/w77d0kY1f1M.mp4/w77d0kY1f1M.mp4 550 Fundamentals of redox chemistry https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:types-of-chemical-reactions/v/simple-redox-reactions 2024-07-03T22:39:39.589282457Z Simple redox reactions An oxidation/reduction reaction (also known as a "redox" reaction) involves the transfer of electrons. The first definition of oxidation was indeed about oxygen, and meant that an element or compound gained oxygen atoms. However, we eventually came to understand that these chemical reactions frequently involved a transfer of electrons. When an atom loses electrons, it is oxidized. The atom that gains electrons is said to be reduced. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/66664bc7-2ce1-4385-a670-d59ce3706649_1280_720_base.png Simple redox reactions An oxidation/reduction reaction (also known as a "redox" reaction) involves the transfer of electrons. The first definition of oxidation was indeed about oxygen, and meant that an element or compound gained oxygen atoms. However, we eventually came to understand that these chemical reactions frequently involved a transfer of electrons. When an atom loses electrons, it is oxidized. The atom that gains electrons is said to be reduced. https://cdn.kastatic.org/ka-youtube-converted/JH4tn5dyXyE.mp4/JH4tn5dyXyE.mp4 775 Fundamentals of redox chemistry https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/oxidizing-and-reducing-agents-1 2021-07-14T13:19:40Z Oxidizing and reducing agents How to identify the oxidizing and reducing agents.  Jay video https://cdn.kastatic.org/googleusercontent/xJUHrRjMED1cHBi8BejmCitb3_d-toiYG8p2mcLbUi9WDQ0QuDr4AaZVRaLxb3eYUcsFu5o_9dhV1pMO-7mb7wY Oxidizing and reducing agents How to identify the oxidizing and reducing agents.  https://cdn.kastatic.org/ka-youtube-converted/TOdHMORp4is.mp4/TOdHMORp4is.mp4 510 Fundamentals of redox chemistry https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/a/oxidation-number 2023-02-03T23:13:51.228240902Z Oxidation–reduction (redox) reactions article https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/balance-and-redox-reactions1 2021-01-04T18:35:17Z Worked example: Balancing a redox equation in acidic solution When balancing equations for redox reactions occurring in acidic solution, it is often necessary to add H⁺ ions or the H⁺/H₂O pair to fully balance the equation. In this video, we'll walk through this process for the reaction between dichromate (Cr₂O₇²⁻) and chloride (Cl⁻) ions in acidic solution. Jay video https://cdn.kastatic.org/googleusercontent/DA988TN4qcw5ui5Rotn8UNdsbDpy9lKgilOk5_zFQHj424dpPzkVksxMskusdQ3nZHoDXjCrWOtwBWInEqUrvfpq Worked example: Balancing a redox equation in acidic solution When balancing equations for redox reactions occurring in acidic solution, it is often necessary to add H⁺ ions or the H⁺/H₂O pair to fully balance the equation. In this video, we'll walk through this process for the reaction between dichromate (Cr₂O₇²⁻) and chloride (Cl⁻) ions in acidic solution. https://cdn.kastatic.org/ka-youtube-converted/4tLrbMstfm8.mp4/4tLrbMstfm8.mp4 724 Fundamentals of redox chemistry https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/balancing-redox-reactions1 2021-01-04T18:35:19Z Worked example: Balancing a redox equation in basic solution When balancing equations for redox reactions occurring in basic solution, it is often necessary to add OH⁻ ions or the OH⁻/H₂O pair to fully balance the equation. In this video, we'll walk through this process for the reaction between ClO⁻ and Cr(OH)₄⁻ in basic solution. Jay video https://cdn.kastatic.org/googleusercontent/Z_Z_estj7cjC1kxCkD-azszdYChjLzHYIRZ8DWRI16nK_fEo2OxeLw4XDmDwAigFKl_nBtlWs2oXfWSzX_XSS-sTmw Worked example: Balancing a redox equation in basic solution When balancing equations for redox reactions occurring in basic solution, it is often necessary to add OH⁻ ions or the OH⁻/H₂O pair to fully balance the equation. In this video, we'll walk through this process for the reaction between ClO⁻ and Cr(OH)₄⁻ in basic solution. https://cdn.kastatic.org/ka-youtube-converted/Vjs8uK2ovQE.mp4/Vjs8uK2ovQE.mp4 842 Fundamentals of redox chemistry https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/a/oxidation-reduction-redox-reactions 2026-03-26T05:30:45.387289448Z Balancing redox equations article https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:electrochemistry/x203b0fc81a964b2d:redox-reactions/e/oxidation-and-reduction 2025-02-05T10:28:14.374739025Z Oxidation and reduction - Electron transfer reactions Let's test our understanding of oxidation and reduction in terms of electron transfer reaction. exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/e/oxidation-reduction-redox-reactions 2023-06-20T18:48:34.872331336Z Oxidation–reduction (redox) reactions Check your understanding of redox reactions in this set of free practice questions designed for AP Chemistry students. exercise https://www.khanacademy.org/science/telangana-class-10-physical-sciencein/x1ac9c643dc8dffee:chemical-reactions-and-equations/x1ac9c643dc8dffee:redox-reaction/e/oxidising-and-reducing-agents 2021-04-29T08:00:45Z Oxidising and reducing agents Let's practice identifying oxidizing and reducing agents in redox reactions. exercise