0.1 M HQ acid has pH=3 then findits ionization constant.

1.	0.1 M HQ acid has pH=3 then findits ionization constant.
Answer» `3xx10^(-1)` `1xx10^(-3)` `1xx10^(-5)` `1xx10^(-7)` Solution :`{:(,HQoversettolarr, H^+ +, Q^-),("Initial " , 0.1 M, O,O),("Ionized MOLE",X,x,x),(,darr,darr,darr),("Mole at EQUILIBRIUM",0.1-x,x,x):}` pH=3 `THEREFORE [H^+]=10^(-3)` `therefore x=10^(-3)` `therefore K_a=((x)xx(x))/(0.1-x)` `=(10^(-3))^2/(0.1-10^(-3)) approx 10^(-6)/0.1 = 1xx10^(-5)`

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