State the electrode is calibrated with nbs standard buffers

Reference no: EM13170703

For a certain glass electrode, the selectivity coefficient for Na+ relative to H+ is 1.0E-12. The electrode is calibrated with NBS standard buffers 6.86 and 9.18, which produce no significant response to interfering ions. It is then used to measure the pH of 0.0100 M NaOH in 0.50 M NaCl at 25 degrees C. What is the observed pH under these conditions? Is it consistent with what you might expect, given the selectivity coefficent?

Reference no: EM13170703

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