Question

the pka of HOCL is 7.5. Calculate the pH of a 0.53 m solution of HOCL


the pka of HOCL is 7.5. Calculate the pH of a 0.53 m solution of HOCL

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Answer #1

The reaction of HOCl as acid :

Acid constant Ka for reaction

Initial concentration of HOCl = 0.53 M

At equilibrium if x moles of acid are dissociating then

At equilibrium concentrations of

acid contant

Acid ionization constant vlue is very small that means a small concentration of HOCl is ionized, leaving the concentration of unionized HOCl concentration (0.53-x) can be considered unchanged. Therefore the equation can be rewrite as:

Therefore the

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