Strong and Weak Electrolytes

Strong and Weak Electrolytes• Substances whose aqueous solutions produce lots of free

moving ions are called STRONG ELECTROLYTES!• Substances whose aqueous solutions produce few free

moving ions are called WEAK ELECTROLYTES!• Substances whose aqueous solutions are good conductors

of electricity are called STRONG ELECTROLYTES!• Substances whose aqueous solutions are poor conductors

of electricity are called WEAK ELECTROLYTES!

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Strong and Weak Electrolytes• Strong acids, strong bases and soluble salts are

STRONG ELECTROLYTES!

• HI, HBr, HCl, HNO3, and H2SO4 are strong acids (the rest are weak).

• LiOH, NaOH, KOH, RbOH, and CsOH are strong bases (the rest are weak).

• Weak acids, weak bases, & insoluble salts are WEAK ELECTROLYTES!

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Strong and Weak ElectrolytesEx.1) Which of the following substances would most likely

be the best electrolyte?(1) KNO3 (3) CH3COOH (2) Ag2SO4 (4) NH3

Ex.2) Which of the following solutions would be the best conductor of electricity?(1) AgBr(aq) (3) Li2CO3(aq) (2) BaSO4(aq) (4) PbI2(aq)

Ex.3) Which of the following substances would produce the greatest number of free moving ions when in a

saturated aqueous solution?(1) HCl (3) Mg(OH)2

(2) Ag2S (4) HC2H3O2

soluble salt

soluble salt

insoluble salt

insoluble saltinsoluble salt insoluble salt

insoluble saltstrong acid

weak acid

weak acid

weak base

weak base