Question 2 10 points Choose an acid/salt combination that would produce a buffered solution near pH...

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1. You are asked to prepare a buffered solution at a pH of 4.30 using the...

1. You are asked to prepare a buffered solution at a pH of 4.30 using the following acids and its potassium salt. What ratio of [HA] / [A- ] is required for each system? a) Benzoic acid (C7H6O2, Ka = 6.4 x 10-5) b) Hypochlorous acid (HClO; Ka = 3.5 x 10-8) c) Which system would you choose to prepare the most effective buffering system? Explain. d) For the system you chose, what mass (in grams) of all the necessary...
A solution buffered at pH 3.90 is needed for a reaction. Would formic acid (HCOOH =...

A solution buffered at pH 3.90 is needed for a reaction. Would formic acid (HCOOH = HA) and its salt, sodium formate, NaHCO2 = NaA), make a good choice for this buffer? If so, what ratio of moles of A- and HA is needed? Use the Henderson Hasselbalch Equation. Ka formic acid = 1.8 x 10-4