Calculate the pH of a 0.089 M solution of an organic acid HA in water (pKa= 4.62). Present your answer as a numerical va

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Calculate the pH of a 0.089 M solution of an organic acid HA in
water (pKa= 4.62).
Present your answer as a numerical value only, to one decimal
place, in the form x.xEx.
Preliminary Note
Although this is not applied in this question, the significant
figures in logs (and therefore in pK's and pH's) are only counted
after the decimal point.

Thus pH values of 15.76, 5.76, 0.76 and 0.01 are all accurate to
two significant figures.