If C the concentration of a weak electrolyte, α is the degree of ionization and K a is the acid ionization constant, then the correct relationship between α , C and K a is

Question

If C the concentration of a weak electrolyte, α is the degree of ionization and K a is the acid ionization constant, then the correct relationship between α , C and K a is, α 2 = K a C, α 2 = C K a, α = C K a, α = K a C

MARKS App · Accepted Answer

According to the Ostwald’s dilution formula α 2 = K ( 1 - α ) C . But for weak electrolytes α is very small. So that ( 1 - α ) can be neglected. So that α = K a C .

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