Write down characteristics of acid.?

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Aqueous solutions of acids are electrolytes, meaning that they conduct electrical current. ...
Acids have a sour taste. ...
Acids change the color of certain acid-base indicates. ...
Acids react with active metals to yield hydrogen gas. ...
Acids react with bases to produce a salt compound and water.

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Acids & Bases, Properties & Characteristics of Acids & Bases

https://edurev.in/studytube/Acids-Bases-Properties-Characteristics-of-Acids-B/367f3cb6-0ee1-4de0-8438-94e5366d7768_v

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General Characteristics of Acids:

*pH < 7.

*Sour taste (though you should never use this characteristic to identify an acid in the lab)

*Reacts with a metal to form hydrogen gas.

*Increases the H+ concentration in water.

*Donates H+ ions.

*Turns blue litmus indicator red.

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Produces H+ ions and sour in taste

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Characteristics of Acids:

Acids are a unique group of compounds that play a significant role in our daily lives. They possess several distinct characteristics that differentiate them from other substances. Let's explore the key features of acids in detail:

1. Sour Taste:
Acids are known for their sour taste, which is easily recognizable. For example, citric acid present in lemons gives them their characteristic tangy flavor. However, it's important to note that not all sour-tasting substances are acids.

2. Corrosive Nature:
Acids have a corrosive nature, meaning they have the ability to corrode or dissolve various substances. This property is often utilized in industries for cleaning purposes or in laboratories for etching glassware. Strong acids like sulfuric acid and hydrochloric acid are particularly corrosive and can cause severe burns if not handled with care.

3. Turns Litmus Paper Red:
Litmus paper is a commonly used indicator to test the acidic or basic nature of a substance. Acids turn blue litmus paper red, indicating their acidic nature. This reaction occurs due to a change in the structure of the litmus dye when it comes into contact with hydrogen ions (H+) present in the acid.

4. Reacts with Metals:
Acids are known for their ability to react with metals, producing hydrogen gas (H2) in the process. This reaction is known as the metal-acid reaction. For example, when hydrochloric acid reacts with zinc, it produces zinc chloride and hydrogen gas.

5. Conduct Electricity:
Acids are electrolytes, which means they can conduct electricity when dissolved in water. This is due to the presence of free ions (H+) in the solution. The concentration of hydrogen ions determines the strength of the acid. Strong acids, such as sulfuric acid, ionize completely in water and have a higher concentration of hydrogen ions, thus conducting electricity more effectively.

6. pH Less Than 7:
The pH scale is used to measure the acidity or basicity of a substance. Acids have a pH value less than 7, with lower pH values indicating stronger acids. The pH scale is logarithmic, meaning each unit represents a tenfold change in acidity. For example, a substance with a pH of 3 is ten times more acidic than a substance with a pH of 4.

7. Reacts with Bases:
Acids react with bases to form a neutralization reaction, resulting in the production of a salt and water. This reaction is widely used in various applications, such as in the production of fertilizers, medicines, and soaps.

In conclusion, acids possess distinct characteristics such as a sour taste, corrosive nature, ability to turn litmus paper red, reactivity with metals and bases, ability to conduct electricity, and a pH value less than 7. Understanding these characteristics helps us identify and work with acids effectively in various practical applications.

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