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Suppose you wish to use the nitrite-selective electrode to measure the concentration of NO 2 . If the concentration of NO2 is 2.2X10^4, what is

Suppose you wish to use the nitrite-selective electrode to measure the concentration of NO 2 –. If the concentration of NO2– is 2.2X10^–4, what is the maximum pH you can tolerate if the error due to OH – must be less than 10%?

The selectivity coefficient for OH –, K (NO2 /OH) is 6300.

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