What Is the PH of a Buffer System Prepared by Dissolving

question 89

Multiple Choice

What is the pH of a buffer system prepared by dissolving 10.70 grams of NH₄Cl and 35.00 mL of 12 M NH₃ in enough water to make 1.000 L of solution? K_b = 1.80 × 10^-5 for NH₃.

• A) 8.93
• B) 9.26
• C) 9.58
• D) 11.32

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Definitions:

Frequencies

In psychology, often refers to the rate at which a behavior occurs or the rate of occurrence of a particular mental process.

Harmony

The combination of simultaneously sounded musical notes to produce chords and chord progressions having a pleasing effect.

Stimulus

Any event or situation that evokes a response from an organism.

Pressure Wave

A type of wave propagated through fluids or gases where the wave fronts consist of regions of high and low pressure.