When Preparing an Acetate Buffer at PH 4

question 17

Multiple Choice

When preparing an acetate buffer at pH 4.5 with 0.01 M solutions of acetic acid (pK_a = 4.8) and sodium acetate, the volume of acetic acid needed would be ____ the volume of sodium acetate solution.

• A) equal to
• B) less than half of
• C) more than half of
• D) about six times
• E) about twice

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Definitions:

Dissipation

Loss of energy, especially the conversion of electrical energy into heat in a circuit due to resistance.

Voltage Divider

A circuit that generally is constructed by connecting resistors in series to produce desired voltage drops across the resistors.

Voltages

The electrical potential difference between two points in a circuit, measured in volts (V), driving current flow through the circuit.

Total Resistance

The overall resistance in an electrical circuit, calculated differently for series and parallel circuits.