HZ Is a Weak Acid

question 133

Multiple Choice

HZ is a weak acid.An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in sufficient water to yield 1.0 L of solution.The pH of the solution was 4.93 at 25.0 °C.The K_a of HZ is ________.

• A)1.2 × 10^-5
• B)6.9 × 10^-9
• C)1.4 × 10^-10
• D)9.9 × 10^-2
• E)2.8 × 10^-12

Develop communication strategies for patients with hearing difficulties.

Identify symptoms of ear infections in children.

Describe the effects of adjusting audiometer settings on sound.

Outline preventive measures for ear infections.

---

Definitions:

Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution of data.

Visual Representation

The use of images, diagrams, graphs, or other visual formats to present data or information for easier understanding.

Proportion

A statistical measure that refers to the fraction of the total number of outcomes in a particular category.

Frequency Polygon

A graphical representation of the distribution of a dataset that shows how often each value in the dataset occurs.