Which of the following aqueous solutions are good buffer systems? 0.21 M hydroiodic acid 0.23 M...

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Which of the following aqueous solutions are good buffer systems? 0.21 M hydroiodic acid 0.23 M potassium iodide 0.13 M hypochlorous acid + 0.12 M sodium hypochlorite 0.37 M hydrofluoric acid 0.26 M sodium fluoride 0.33 M ammonium bromide 0.3s M ammonia 0.13 M sodium hydroxide 0.28M sodium bromide

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