076. Solving a chemistry problem
12. A lead-selective electrode whose potential is -0.471 V (NKE) was immersed in 50.0 ml of a solution containing traces of Pb(II). After adding 5.0 ml of 0.0200 M Pb(II) solution, the potential became -0.499 V. What is the concentration (M) of lead in the solution?
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