Problem: The weak acid HZ has a K a of 2.55×10 −4.(a) Calculate the pH of 0.075 M HZ.

FREE Expert Solution

The dissociation:

HZ  ⇌  H+  +  Z-

Ka=productsreactantsKa=[H+][Z-][HZ]=2.55×10-4[x][x][0.075]=2.55×10-4x2=(2.55×10-4)(0.075)

x = 4.373x10-3 M = [H+]


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Problem Details

The weak acid HZ has a K a of 2.55×10 −4.

(a) Calculate the pH of 0.075 M HZ.

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