a-trak we learn about the rules for determining oxidation numbers we now enter the concept of redox reactions in short Leo Ceger said from the word Los electrons is oxidation losing electrons is oxidation and capturing electrons is reduction Kin electrons reduction well there are several concepts of oxidation-reduction reactions Here the first is based on proxy gen then hydrogen transfer electron transfer and changes in oxidation numbers the first concept is based on oxygen transfer in this case oxidation means getting oxygen Hi reduction losing oxygen Okay or for example fe2 O3 forms this effect reduction because of losing oxygen and CEO forms CO2 this is an oxidation reaction because of capturing oxygen the second concept is based on hydrogen transfer although today it is rare but we also need to understand that oxidation means Losing is game and reduction means getting hydrogen for example ethanol will be oxidized to form ethane and ethanol will capture hydrogen H2 to form ethanol the next concept redox is based on electron transfer where the oxidation reaction releases electrons later the reduction action captures electrons if one step is called a redox reaction the last concept Based on changes in oxidation numbers where oxidation occurs an increase in oxidation numbers and reduction occurs a decrease in oxidation numbers for example EMG initially the oxidation number is zero because the free element forms a positive MV of two because in the compound and hydrogen in a positive compound one becomes zero because the free element here there is a decrease and increase in the oxidation number Oh becomes Plus 2 that is an obsession reaction and unites to become Noah that is the next reduction reaction which is blue this has delicious and positive one then Onya mint green two also the same hydrogen plus one here also the plane pay attention to the cr2 because the free element the film is here CL min 1 there is a decrease and here the jne plus one there is an increase So in one species the CL element experiences a decrease and an increase in the oxidation number redox reaction Hi another example delicious add C2 to nack5 naena releases electrons oxidation reaction and CR receives electrons Reduction reaction next example me2 mula + 3 becomes Plus 2 Sex reduction reaction oxidation reaction because there is an increase in the number from no to fighter while the number n and o in nu3 do not experience a change in oxidation number called spectator ion or Palangka ion What about the following reaction for delicious before and after it is positive hi oxygen Hi Then the hydrogen has the same task and the CR is also the same there is no change in oxidation number because this is not a redox reaction now disproportionation reaction there are several species of the same element that experience oxidation and reduction for example oxygen in peroxide biloxnya meet one and here mint two there is a decrease in the number and here 0rj is filled with fish number one oxygen species undergoes Reduction reaction also undergoes oxidation reaction next example VR initially no because the free element rises to + 5 oxidation reaction and decreases to min 1 One-step reduction reaction redox reaction and one species undergoes oxidation as well as reduction disproportionation reaction now What is an oxidizing agent and a reducing agent type fe2 O3 undergoes reduction to FX the set is called an oxidizer its task is to reduce CO2 which undergoes oxidation is called a reducing agent which undergoes reduction oxidizer which undergoes foreign toxide reductor we can conclude that the oxidizing agent oxidizes other substances considers by way of undergoing Reduction reaction as a source of oxygen and such a reducing agent can be different by way of undergoing oxidation reaction usually takes oxygen Okay that's the explanation Hopefully it can be accepted keep learning and always be successful Thank you