A Chemist Prepares a Buffer Solution by Mixing 70 ML

question 111

Multiple Choice

A chemist prepares a buffer solution by mixing 70 mL of 0.15 M NH₃ (K_b = 1.8 × 10^-5 at 25 °C) and 50 mL of 0.15 M NH₄Cl.Calculate the pH of the buffer.

• A)​10.88
• B)​4.26
• C)​4.59
• D)​8.24
• E)​9.40

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