A 5900-ML Sample of 0

question 9

Multiple Choice

A 59.00-mL sample of 0.0650 M HCN (K_a = 6.2  10^-10) is titrated with 0.670 M NaOH. What volume of 0.670 M NaOH is required to reach the stoichiometric point?

• A) 5.72 mL
• B) 59.0 mL
• C) 608 mL
• D) 0.00164 mL
• E) 3.84 mL

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Definitions:

Random Assignment

A method used in experiments to assign participants to different groups in a way that each has an equal chance of being placed in any group, aiming to eliminate bias and ensure that groups are comparable.

Confounding Variables

Factors other than the independent variable that might affect the outcome of an experiment or study, potentially leading to erroneous conclusions.

Diastolic Blood Pressure

The pressure in the arteries when the heart rests between beats, considered the lower number in a blood pressure measurement.

Response Variable

The variable in an experiment or study that is affected by the manipulation of the independent variable, also known as the dependent variable.