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The selectivity coefficient, KL.H for a Li + ion selective electrode is 4 × 104, when the electrode is placed in 3.44 × 10-4 mol L-1 Li+ solution at pH 7.2, the potential is -0.333 V versus a saturated calomel electrode. What would be the potential if the pH were lowered to 1.1 and the ionic strength was kept constant?

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