pH of acids, bases and salts

Exercise 19

    

Calculate the degree of ionization of a solution of ethanoic acid $(pK_a=4,75)$ with concentration $c$ = 0.557 $M$

Weak acid The equation $\alpha^2c$ $+$ $K_a\alpha$ $-$ $K_a$ $=$ $0$ produces: $\alpha$ $=$ 0.00563 The ionization takes place at 0.563%