% Ionization

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Rhea Shah 2F
Posts: 97
Joined: Thu Jul 25, 2019 12:17 am

% Ionization

Postby Rhea Shah 2F » Sun Jan 19, 2020 4:56 pm

What is the % ionization of an acid/base?
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405318478
Posts: 90
Joined: Sat Jul 20, 2019 12:16 am

Re: % Ionization

Postby 405318478 » Sun Jan 19, 2020 4:58 pm

It can be calculated by (conjugate acid)/(initial base) * 100%.
for an acid, it would be (conjugate base)/(initial acid) * 100%
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AMahadi
Posts: 93
Joined: Thu Jul 11, 2019 12:17 am

Re: % Ionization

Postby AMahadi » Sun Jan 19, 2020 5:24 pm

what does it mean if x less than 5% of initial, then approximation is ok?
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Shail Avasthi 2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: % Ionization

Postby Shail Avasthi 2C » Sun Jan 19, 2020 5:28 pm

@AMahadi, if your Ka or Kb is small (<10^-3), then you are allowed to eliminate all x values in the equilibrium expression which follows the form (n-x). This makes calculating the value of x more simple. If the percent ionization of the acid or base is <5%, then this approximation is valid.
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