Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that a is smal? (Ka for HF is 6.8 x 10-4.).

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A session.masteringchemistry.com/myct/itemView?assignmentProblemID=155728527&offset=next
<HW5_acids and bases
Exercise 16.66
Determine the pH of an HF solution of each of the following
concentrations. In which cases can you not make the simplifying
assumption that is smal? (Ka for HF is 6.8 x 10-4.)
Part A
0.250 M
Express your answer to two decimal places.
pH =
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Part B
4.90x10-2 M
Express your answer to two decimal places.
pH =
Submit
Request Answer
Part C
2.10x10-2 M
Express your answer to two decimal places.
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Transcribed Image Text:A session.masteringchemistry.com/myct/itemView?assignmentProblemID=155728527&offset=next <HW5_acids and bases Exercise 16.66 Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that is smal? (Ka for HF is 6.8 x 10-4.) Part A 0.250 M Express your answer to two decimal places. pH = Submit Request Answer Part B 4.90x10-2 M Express your answer to two decimal places. pH = Submit Request Answer Part C 2.10x10-2 M Express your answer to two decimal places. 国
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