The concentration of Na+ in a solution was determined by making measurements with a ion selective electrode for sodium.

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answerhappygod
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The concentration of Na+ in a solution was determined by making measurements with a ion selective electrode for sodium.

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The concentration of Na+ in a solution was determined by making
measurements with a ion selective electrode for sodium. The
electrode system developed a potential of -0.2462 V when immersed
in 10 mL of a solution of unknown concentration. After the addition
of 1.00 mL of 2.00 x 10-2 M NaCl, the potential changed to -0.1994
V. Calculate the Na+ concentration of the original solution.
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