What Is the Change in PH After Addition of 10

question 39

Multiple Choice

What is the change in pH after addition of 10.0 mL of 1.0 M sodium hydroxide to 90.0 mL of a 1.0 M NH₃/1.0 M NH₄⁺ buffer? [Kb for ammonia is 1.8 × 10^-5]

• A) 1.0 pH unit
• B) 0.1 pH unit
• C) 0.01 pH unit
• D) 0.001 pH unit
• E) zero

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Definitions:

Lecithin

A fatty substance found in plant and animal tissues that is utilized as an emulsifier in food products.

Triglyceride

A type of fat molecule consisting of three fatty acids linked to a glycerol backbone, stored in the body's fat cells.

Wax

A broad group of organic substances that are solid at room temperature but melt upon heating, often used as protective coatings or in candle making.

Organic Compound

Organic compounds are chemicals that contain carbon bonded to other elements, particularly hydrogen, and are found in living organisms.