Deduce plausible monomers for polymers with the following repeating units: (a) ( CH2CHCHCH2)n (b) ( CO( CH2)6NH )n

Reference electrodes Standard Hydrogen electrode (SHE) has reduction potential of 0.00V by definition. Pressure is 1 atm and [H+]=1.00. SHE is theoretical, cannot actually be achieved because [H+]=1 cannot be achieved due to activities. A real life SHE must be corrected with the Nernst equation. Example: you have a hydrogen electrode at 720 torr and a pH of 4. What is the potential The reduction of hydrogen is: 2H+ + 2e- = H . 2 Using Nernst equation: 0 2 E = E – 0.0592/n*log(Q) = 0 – 0.0592/2*log((720/760)/(10^-4) ) = -0.236 V Remember to square the hydrogen concentration. Q expression is products over reactants raised to the balancing coefficients. Galvan