A 10-Liter Solution Contains 0

question 40

Multiple Choice

A 1.0-liter solution contains 0.25 M HF and 0.33 M NaF (K_a for HF is 7.2 × 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) 3.28
• C) 0.14
• D) -0.11
• E) -0.28

---

Definitions:

Variable Cost Per Unit

The cost that changes in proportion to the level of output or activity, calculated on a per-unit basis.

Net Operating Income

A company's total earnings derived from its operations, excluding taxes and interest.

Advertising

The activity or profession of producing advertisements for commercial products or services.

Contribution Format

A way of presenting a profit and loss statement where costs are separated into variable and fixed, and the contribution margin is highlighted.