A 250 ML Sample of an HCl Solution Is Titrated with with a 0.139

question 76

Multiple Choice

A 25.0 mL sample of an HCl solution is titrated with a 0.139 M NaOH solution. The equivalence point is reached with 15.4 mL of base. The concentration of HCl is ________ M.

• A)11.7
• B)0.00214
• C)0.0856
• D)0.267
• E)0.139

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Definitions:

Smooth Muscle

A type of muscle found in the walls of internal organs, such as the stomach and blood vessels, that contracts involuntarily.

Calcium-Calmodulin Complex

A complex formed when calcium ions bind to the protein calmodulin, playing a key role in various cellular processes.

Myofibrils

The basic rod-like unit of a muscle cell, composed of sarcomeres, which are responsible for the muscle's contractile properties.

Sarcomeres

The basic contractile units of muscle fiber, defined by the region between two Z lines, responsible for muscle contraction.