Which of the Following Values Is the PKa for a Weak

question 34

Multiple Choice

Which of the following values is the pKa for a weak acid that is 25% deprotonated at pH 4?

• A)3.40
• B)3.52
• C)4.48
• D)4.60

---

Definitions:

Volcanic Dome

A rounded volcanic feature created by slow-moving or viscous magma that piles up near a vent instead of flowing away.

Vesuvius

A well-known active volcano located on the Gulf of Naples in Campania, Italy, famous for its eruption in AD 79 that destroyed the Roman cities of Pompeii and Herculaneum.

Pyroclastic Flows

Fast-moving currents of hot gas and volcanic materials that flow down the slopes of a volcano during an eruption.

Composite Volcanoes

Volcanoes characterized by explosive eruptions and composed of alternating layers of lava flows, volcanic ash, and other volcanic materials.