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A solution contains 0.003Mof sodium phenobarbital together with a buffer consisting of 0.20 M sodium acetate...

A solution contains 0.003Mof sodium phenobarbital together with a buffer consisting of 0.20 M sodium acetate and 0.30 M acetic acid. Acetic acid is a weak electrolyte; its degree, or fraction, of dissociation, α, at this concentration is 0.008 and the undissociated species do not contribute to the ionic strength. What is the ionic strength of the solution?

pka for acetic acid = 4.8

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