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A Different Look At Buffers

A Different Look At Buffers. Write the equation for the dissociation of hydrogen fluoride. (B-L perspective). HF (aq) + H 2 O (l) ? H 3 O + (aq) + F - (aq). Write the K a expression:. = 7.2 x 10 -4. K a = [ H 3 O + ] [F - ] / [HF]. What is the K a value?. Small.

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