The Following Question Refers to the Following System: a 1 $\times$

question 71

Multiple Choice

The following question refers to the following system: A 1.0-liter solution contains 0.25 M HF and 0.32 M NaF (K_a for HF is 7.2 $\times$ 10^-4) . If one adds 0.30 liters of 0.020 M KOH to the solution,what will be the change in pH?

• A)0.02
• B)3.27
• C)0.13
• D)-0.11
• E)-0.28

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Definitions:

Bioaccumulation

The concentration of a chemical pollutant in the tissues of an organism rises over the course of the organism’s lifetime.

Greenhouse Effect

Warming of Earth’s lower atmosphere and surface as a result of heat trapped by greenhouse gases.

Primary Production

The production of organic compounds from atmospheric or aquatic carbon dioxide, principally through the process of photosynthesis or chemosynthesis.