What Is the PH of a Buffer That Results When

question 27

Multiple Choice

What is the pH of a buffer that results when 0.40 mol NaHCO₂ is mixed with 100.0 mL of 2.00 M HCl(aq) and diluted with water to 250 mL? (K_a of HCO₂H = 1.8 × 10^-4)

• A) −0.301
• B) 3.05
• C) 3.44
• D) 3.74
• E) 4.05

---

Definitions:

Office App

Generic term for any application software that is designed to help the user to perform various tasks related to document creation, calculation, presentation, and email management, often included in office suites.

Operating System

Software that manages computer hardware, software resources, and provides common services for computer programs.

Storage Devices

Hardware components used to store digital data, such as hard drives, SSDs, USB flash drives, and memory cards.

KeyTip

A feature in Microsoft Office products that allows users to quickly access commands in the Ribbon by pressing the Alt key followed by a sequence of letters.