Question: The potential of a pH electrode in a buffer was measured to be -140.8 mV and the calibration curve was measured to be E (mV)=-58.02pH+372.9

The potential of a pH electrode in a buffer was measured to be -140.8 mV and the calibration curve was measured to be

E (mV)=-58.02pH+372.9

Calculate the pH.

Please report your answer to 3 significant digits

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