200. Calculate the EMF of the circuit at 298K, consisting of hydrogen and silver chloride electrodes immersed in a buffer solution containing 0.3 g of CH3COOH and CH3COONa in 0.5 l. The electrolyte concentration in the silver chloride reference electrode is 1 mol/l. Reference data: pKa=4.76, the potential of the silver chloride electrode is 0.238 V.

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