To Simulate the PH of Blood,which Is 7 $\times$ 10^-8)and Sodium Hydrogen Phosphate (K_a = 3

question 229

Multiple Choice

To simulate the pH of blood,which is 7.4,a buffer solution made by dissolving sodium dihydrogen phosphate (K_a = 6.2 $\times$ 10^-8) and sodium hydrogen phosphate (K_a = 3.6 $\times$ 10^-13) together in an aqueous solution can be used.What mole ratio of Na₂HPO₄/NaH₂PO₄ is required to produce a solution with a pH of 7.4?

• A)1.2
• B)1.6
• C)0.90
• D)1.0
• E)0.96

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