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Please answer all parts as I am limited on questions. Thanks in advance. Determine the pH...

Please answer all parts as I am limited on questions. Thanks in advance.

Determine the pH of an HFsolution of each of the following concentrations. In which cases can you not make the simplifying assumption that x is small? (Ka for HF is 6.8×10−4)

Part A

0.260 M

Express your answer to two decimal places.

Part B: 0.0490 M

Part C: 0.0250 M

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