By Sunil Bhardwaj

3538 Views

According to Bronsteo-Lowry, an acid is a substance that is able to donate a proton $$({ H }^{ + })$$ to some other substance and a base, is a substance that is able to accept a proton from an acid.

Acid $$\longrightarrow$$ a proton donor Base $$\longrightarrow$$ a proton acceptor.

For example, when HCl is added to water the reaction shows HCl acting as a proton donor (Bronsted acid) and $${ H }_{ 3 }{ O }^{ + }$$ acting as a proton acceptor (Bronsted base). $$HCl + { H }_{ 2 }O \rightleftharpoons { H }_{ 3 }{ O }^{ + } + { Cl }^{ - }$$ The reverse of the above reaction is also an acid base reaction, with hydronium ion serving as an acid by giving up its proton, and with chloride ion functioning as a base by accepting it. $$\underset { Acid }{ HCl } + \underset { Base }{ { H }_{ 2 }O } \rightleftharpoons \underset { Acid }{ { H }_{ 3 }{ O }^{ + } } + \underset { Base }{ { Cl }^{ - } }$$ Thus, we might view our reaction as an equilibrium where we have two acids and two bases. Thus, every Bronsted acid is coupled with a related Bronsted base. When the acid HCl reacts it yields the base $${ Cl }^{ - }$$. These two substances are related to one another by the loss or gain of a single proton. These two together constitute conjugate acid-base pair. ln general, we say that every acid has its conjugate base and every base has its conjugate acid.

#### Latest News

• Become an Instructor 4 March, 2018

Apply to join the passionate instructors who share their expertise and knowledge with the world. You'll collaborate with some of the industry's best producers, directors, and editors so that your content is presented in the best possible light..

#### More Chapters

• Spectroscopy
• Basic Quantum Chemistry
• Phase Rule
• Electrochemistry
• Colloidal State
• Chemical Thermodynamics
• Gaseous State
• Applied Electrochemistry
• Ionic Equilibria
• Nuclear Chemistry
• Solid State Chemistry
• Chemical Kinetics
• #### Other Subjects

• English
• Applied Physics
• Environmental Studies
• Physical Chemistry
• Analytical Chemistry
• Organic Chemistry
• Soft Skills
• Engineering Drawing
• General Medicine
• Mathematics
• Patente B Italia