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Reaction Where Hydrogen Oxidation Number Changes
On the Reaction of Hydrogenation Valence Change
The chemical reaction of hydrogen, the valence change of hydrogen, there are signs. Looking at all kinds of reactions, either oxidation or reduction, the change of hydrogen valency is really related to the essence of the reaction.
In the reaction of metals and acids, common ones are zinc and dilute sulfuric acid. Zinc is reductive, and hydrogen ions in sulfuric acid are oxidizing. Zinc loses electrons, and the valence increases, while hydrogen ions gain electrons, and the valence decreases from + 1 to 0, resulting in hydrogen escaping. In this reaction, the valence of hydrogen changes from the + 1 valence of the combined state to the 0 valence of the free state, which is a typical redox reaction. Hydrogen ions are oxidizing agents, and electrons are reduced.
Another example is the reaction between hydrogen and metal oxides. Take hydrogen reducing copper oxide as an example. Hydrogen is reducing, and copper ions in copper oxide are oxidizing. During the reaction, hydrogen atoms in hydrogen lose electrons, and the valence increases from 0 liters to + 1, and combines with oxygen to form water; copper ions in copper oxide gain electrons, and the valence decreases. During this process, the valence of hydrogen changes, and hydrogen is oxidized as a reducing agent, while copper oxide is reduced.
Another example is the reaction between certain compounds. Sodium hydride reacts with water, the hydrogen in sodium hydride is -1 valence, and the hydrogen in water is + 1 valence. When the two meet, a neutralization reaction occurs, and the -1 valence hydrogen in sodium hydride combines with + 1 valence hydrogen in water to form hydrogen gas. The valence of hydrogen changes to 0 valence, respectively.
All these reactions can be seen changing the valence of hydrogen. Either because of the gain and loss of electrons, or because of the interaction between elements, the valence of hydrogen is different from before and after the reaction. This is the wonder of chemical reactions. If you explore it, you can understand the principle of chemical changes.
The chemical reaction of hydrogen, the valence change of hydrogen, there are signs. Looking at all kinds of reactions, either oxidation or reduction, the change of hydrogen valency is really related to the essence of the reaction.
In the reaction of metals and acids, common ones are zinc and dilute sulfuric acid. Zinc is reductive, and hydrogen ions in sulfuric acid are oxidizing. Zinc loses electrons, and the valence increases, while hydrogen ions gain electrons, and the valence decreases from + 1 to 0, resulting in hydrogen escaping. In this reaction, the valence of hydrogen changes from the + 1 valence of the combined state to the 0 valence of the free state, which is a typical redox reaction. Hydrogen ions are oxidizing agents, and electrons are reduced.
Another example is the reaction between hydrogen and metal oxides. Take hydrogen reducing copper oxide as an example. Hydrogen is reducing, and copper ions in copper oxide are oxidizing. During the reaction, hydrogen atoms in hydrogen lose electrons, and the valence increases from 0 liters to + 1, and combines with oxygen to form water; copper ions in copper oxide gain electrons, and the valence decreases. During this process, the valence of hydrogen changes, and hydrogen is oxidized as a reducing agent, while copper oxide is reduced.
Another example is the reaction between certain compounds. Sodium hydride reacts with water, the hydrogen in sodium hydride is -1 valence, and the hydrogen in water is + 1 valence. When the two meet, a neutralization reaction occurs, and the -1 valence hydrogen in sodium hydride combines with + 1 valence hydrogen in water to form hydrogen gas. The valence of hydrogen changes to 0 valence, respectively.
All these reactions can be seen changing the valence of hydrogen. Either because of the gain and loss of electrons, or because of the interaction between elements, the valence of hydrogen is different from before and after the reaction. This is the wonder of chemical reactions. If you explore it, you can understand the principle of chemical changes.
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