Question

Какая реакция является качественной на сероводородную кислоту и ее растворимые соли​

Answer 1

Ответ:

качественная со свинцом и медью. сульфид меди растворится в соляной, а сульфид свинца нет

Answer 2

Qualitative Reaction to Hydrogen Sulfide Acid and its Soluble Salts

When it comes to the qualitative reaction to hydrogen sulfide acid (H2S) and its soluble salts, there are a few key observations to consider. Here are the details:

Hydrogen Sulfide Acid (H2S): Hydrogen sulfide acid is a colorless gas with a strong odor of rotten eggs. It is a weak acid that can dissociate in water to form hydrosulfuric acid (HS-) and sulfide ions (S2-). When exposed to certain substances, hydrogen sulfide acid can undergo various reactions, resulting in different products.

Soluble Salts of Hydrogen Sulfide: Soluble salts of hydrogen sulfide, such as metal sulfides, can also react with water to produce hydrogen sulfide gas. These salts are typically formed by the combination of a metal cation and the sulfide anion.

Reaction with Metal Ions:

When hydrogen sulfide acid or its soluble salts come into contact with metal ions, a precipitation reaction may occur. This reaction leads to the formation of insoluble metal sulfides. The color of the precipitate can vary depending on the metal involved. Here are a few examples:

- Lead (Pb2+): When hydrogen sulfide reacts with lead ions, it forms a black precipitate of lead sulfide (PbS). - Cadmium (Cd2+): The reaction between hydrogen sulfide and cadmium ions results in the formation of a yellow precipitate of cadmium sulfide (CdS). - Iron (Fe3+): Hydrogen sulfide can react with iron(III) ions to produce a black precipitate of iron(III) sulfide (Fe2S3).

These are just a few examples, and the reaction with other metal ions can lead to the formation of different colored precipitates.

Reaction with Acids and Bases:

Hydrogen sulfide acid can also react with acids and bases, resulting in different products. Here are a couple of examples:

- Reaction with Acids: When hydrogen sulfide acid reacts with strong acids, it can act as a reducing agent, undergoing oxidation itself. For example, when hydrogen sulfide reacts with nitric acid (HNO3), it forms sulfuric acid (H2SO4) and nitrogen dioxide (NO2) gas. - Reaction with Bases: When hydrogen sulfide acid reacts with strong bases, it can form salts. For instance, the reaction with sodium hydroxide (NaOH) can produce sodium hydrosulfide (NaHS).

Conclusion:

In summary, the qualitative reactions of hydrogen sulfide acid and its soluble salts involve the formation of insoluble metal sulfides when reacting with metal ions. Additionally, hydrogen sulfide acid can undergo oxidation-reduction reactions with acids and form salts with bases. These reactions result in the formation of various products, including colored precipitates and different chemical compounds.

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