What Is the PH of a Solution Prepared by Mixing

question 143

Multiple Choice

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 mol L^-1 methylamine, CH₃NH₂, with 20.00 mL of 0.10 mol L^-1 methylammonium chloride, CH₃NH₃Cl? Assume that the volume of the solutions are additive and that K_b = 3.70 × 10^-4 for methylamine.

• A) 10.17
• B) 10.57
• C) 10.97
• D) 11.78

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Definitions:

Stage 2 Sleep

A phase of sleep characterized by specific brain wave patterns including sleep spindles and K-complexes, representing a deeper sleep than stage 1.

EEG Activity

The recording of electrical activity along the scalp produced by the firing of neurons within the brain, typically referred to as electroencephalography.

Deep Sleep

A stage of sleep characterized by slow brain waves, reduced heart rate, and low body temperature, which is crucial for restorative sleep and health.

REM Sleep

A unique phase of sleep characterized by rapid movement of the eyes, low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.