The equilibrium equations and Ka values for three reaction systems are given below. a. Which conjugate pair
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a. Which conjugate pair would be best for preparing a buffer with a pH of 6.96? Why?
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NH4+(aq) + H2O-H3O+ + NH3(aq); Ka-5.6 x 10-10 H2CO3(aq) + H20: H30"(aq) + HCO3-(aq); Ka = 4.3 × 10-7 H2PO4 (aqH20 H30"(aq) + HP042-(aq); Ka = 6.2 × 10-8
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