A 1000 ML Sample of 0

question 26

Multiple Choice

A 100.0 mL sample of 0.20 mol L^-1 HF is titrated with 0.10 mol L^-1 KOH. Determine the pH of the solution before the addition of any KOH. The K_a of HF is 3.5 × 10^-4.

• A) 4.15
• B) 0.70
• C) 2.08
• D) 3.46
• E) 1.00

---

Definitions:

Light Therapy

A treatment method that involves exposure to specific wavelengths of light to address conditions such as seasonal affective disorder (SAD) and certain sleep issues.

Seasonal Depression

A type of depression that's related to changes in seasons, typically starting in the fall and continuing through winter.

Relief

A feeling of reassurance and relaxation following release from anxiety or distress.

Cognitive-Behavioral Therapies

A group of psychotherapeutic treatments that address dysfunctional emotions, behaviors, and cognitions through a goal-oriented, systematic procedure.