A 0050 M Solution of the Weak Acid HA Has [H₃O⁺]

question 99

Multiple Choice

A 0.050 M solution of the weak acid HA has [H₃O⁺] = 3.77 × 10^-4 M. What is the K_a for the acid?

• A) 7.5 × 10^-3 M
• B) 2.8 × 10^-6 M
• C) 7.0 × 10^-7 M
• D) 7.0 × 10^-8 M
• E) 2.6 × 10^-11 M

---

Definitions:

Announce

To make a public or formal declaration about a fact, occurrence, or intention.

Grades

Evaluations or scores given to students based on their performance in academic coursework or examinations.

Class Participation

The involvement or engagement of students in the learning process, often through asking questions, contributing to discussions, or participating in class activities.

Emotion-Based Strategy

An approach to decision-making and problem-solving that prioritizes emotional responses and feelings over logical analysis or objective data.