You Wish to Prepare an HC₂H₃O₂ Buffer with a PH

question 171

Multiple Choice

You wish to prepare an HC₂H₃O₂ buffer with a pH of 4.14.If the pK_a of is 4.74,what ratio of C₂H₃O₂⁻/HC₂H₃O₂ must you use?

• A) 0.10
• B) 0.60
• C) 0.25
• D) 3.98
• E) 4.0

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Definitions:

Iconic Memory

A type of visual sensory memory that holds a brief photographic record of the scene in front of an individual for a very short period of time.

Recall Cue

A stimulus or hint that facilitates the access or retrieval of information from memory.

Visuospatial Sketchpad

The proposed component of working memory that maintains visual or spatial information.

Episodic Buffer

A component of the working memory model that integrates information from different sources and modalities, maintaining a sense of chronological flow.