Acid - Base -LEWIS CONCEPT OF ACID-ARRHENIUS CONCEPT OF BASE-LOWRY AND BRONSTED

	ACID, BASE AND SALT
	ACID
	GENERAL DEFINITION
	An acid is a substance which provides hydrogen (H+ ) ions in aqueous solution.
	Example: HCl , HNO3 , H2SO4 etc.
	DIFFERENT CONCEPTS OF ACID
	ARRHENIUS CONCEPT OF ACID
	According to Arrhenius, an acid is a substance, which provides H+ ions in aqueous solution.
	Example:
	HCl + H2O H3O+ + Cl- H2SO4 + H2O H3O+ + HSO4-
	LOWRY AND BRONSTED CONCEPT
	According to Lowry & Bronsted concept, an acid is a compound or species which donates or tends to donate a proton .
	CH3COOH + H2O H3O+ + CH3COO-
	In this example acetic acid donates a proton to water.
	LEWIS CONCEPT OF ACID
	According to Lewis concept, "an acid is a compound or species that accepts a pair of electrons."
	FeCl3, FeBr3, AlCl3 etc. (Lewis acid)
	Br- + FeBr3 è FeBr4-
	For latest information , free computer courses and high impact notes visit : BASE
	GENERAL DEFINITION
	A base is a substance which provides OH- ions in aqueous solution.
	Example: NaOH, KOH, NH4OH etc.
	DIFFERENT CONCEPTS OF BASE
	ARRHENIUS CONCEPT OF BASE
	According to Arrhenius a base is a substance which provides OH- ions in aqueous solution
	NaOH Na+ + OH-
	KOH K+ + OH-
	LOWRY AND BRONSTED CONCEPT OF BASE
	According to Lowry& Bronsted concept a base is a substance or species, which accepts, tends to accept proton in aqueous solution.
	LEWIS CONCEPT OF BASE
	According to this concept "A base is compound or species that donate an pair of electron."
	NH3, OH-, F- etc. For latest information , free computer courses and high impact notes visit :