Dianfeng Chemical
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Hydrogen Sulfide Acid or Base
On hydrogen sulfide as an acid or base
taste the world substance, the nature is divided into acid and base, which is the key in the field of chemistry. Today, we want to determine whether hydrogen sulfide is an acid or a base.
The husband acid, according to the classical theory, can release hydrogen ions ($H ^ + $) in the water solution; the base, can produce hydroxide ions ($OH ^ - $). There is also the acid-base proton theory, acid is the proton donor, base is the proton receptor.
The molecular structure of hydrogen sulfide ($H_2S $) is composed of dihydrogen atoms and one sulfur atom. When hydrogen sulfide is dissolved in water, the following reaction occurs: $H_2S\ rightleftharpoons H ^ ++ HS ^ - $, $HS ^ -\ rightleftharpoons H ^ ++ S ^ {2 -} $. Looking at this reaction, hydrogen sulfide can gradually release hydrogen ions in water. According to the definition of acid, it has the characteristics of acid and can be called acid.
However, if the acid-base proton theory is carefully observed, although hydrogen sulfide is mainly acidic, under certain circumstances, $HS ^ - $and even $S ^ {2 -} $may also accept protons, which can be regarded as bases at this time. However, this situation is relatively rare and requires specific reaction conditions.
In summary, under normal conditions, hydrogen sulfide is dominated by the properties of acid, and it can ionize hydrogen ions in water and be acidic. However, according to the more generalized acid-base theory, it also has the properties of a base in a specific environment. To determine whether hydrogen sulfide is an acid or a base, it should be determined according to the specific situation and the theory adopted.
taste the world substance, the nature is divided into acid and base, which is the key in the field of chemistry. Today, we want to determine whether hydrogen sulfide is an acid or a base.
The husband acid, according to the classical theory, can release hydrogen ions ($H ^ + $) in the water solution; the base, can produce hydroxide ions ($OH ^ - $). There is also the acid-base proton theory, acid is the proton donor, base is the proton receptor.
The molecular structure of hydrogen sulfide ($H_2S $) is composed of dihydrogen atoms and one sulfur atom. When hydrogen sulfide is dissolved in water, the following reaction occurs: $H_2S\ rightleftharpoons H ^ ++ HS ^ - $, $HS ^ -\ rightleftharpoons H ^ ++ S ^ {2 -} $. Looking at this reaction, hydrogen sulfide can gradually release hydrogen ions in water. According to the definition of acid, it has the characteristics of acid and can be called acid.
However, if the acid-base proton theory is carefully observed, although hydrogen sulfide is mainly acidic, under certain circumstances, $HS ^ - $and even $S ^ {2 -} $may also accept protons, which can be regarded as bases at this time. However, this situation is relatively rare and requires specific reaction conditions.
In summary, under normal conditions, hydrogen sulfide is dominated by the properties of acid, and it can ionize hydrogen ions in water and be acidic. However, according to the more generalized acid-base theory, it also has the properties of a base in a specific environment. To determine whether hydrogen sulfide is an acid or a base, it should be determined according to the specific situation and the theory adopted.
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