The Henderson-Hasselbach Equation,used to Calculate the PH of Simple Conjugate-Pair

question 67

Multiple Choice

The Henderson-Hasselbach equation,used to calculate the pH of simple conjugate-pair buffer systems,would be expressed for an ammonia/ammonium chloride buffer,for which K_b(NH₃) is 1.8 × 10^-5,as:

• A)pH = 4.74 + log([NH₃]/[NH₄⁺])
• B)pH = 4.74 + log([NH₄⁺]/[NH₃])
• C)pH = 9.25 + log([NH₃]/[NH₄⁺])
• D)pH = 9.25 + log([NH₄⁺]/[NH₃])
• E)pH = 14.0 - log(1.8 × 10^-5)

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