Acids Bases and Salts Class 10 One Shot
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In chemistry, acids, bases, and salts are three fundamental types of substances with distinct properties and behaviors.
1. Acids:
Acids are substances that can donate a proton (H+) to another substance.
They are characterized by their ability to increase the concentration of hydrogen ions (H+) in a solution.
Acids often have a sour taste and can turn blue litmus paper red.
Common examples include hydrochloric acid (HCl), sulfuric acid (H2SO4), and citric acid (found in citrus fruits).
2. Bases:
Bases are substances that can accept a proton (H+) or, alternatively, donate hydroxide ions (OH-) in a solution.
They are characterized by their ability to increase the concentration of hydroxide ions (OH-) in a solution.
Bases often have a bitter taste and a slippery feel.
Common examples include sodium hydroxide (NaOH), potassium hydroxide (KOH), and ammonia (NH3).
3. Salts:
Salts are compounds formed by the reaction between an acid and a base. This reaction is known as neutralization.
In a salt, the hydrogen ion of the acid is replaced by a metal ion (from the base) or another positive ion.
Salts are usually composed of positive and negative ions that are held together by ionic bonds.
Common examples include sodium chloride (NaCl), potassium nitrate (KNO3), and calcium carbonate (CaCO3).
The pH scale is often used to measure the acidity or basicity of a solution. A pH value less than 7 indicates acidity, a pH value of 7 is neutral, and a pH value greater than 7 indicates alkalinity (basicity). Acids have a pH less than 7, bases have a pH greater than 7, and salts can have a pH close to 7, depending on the ions involved in their formation.
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