A Solution Is Prepared by Dissolving 215 Grams of Methanol

question 55

Multiple Choice

A solution is prepared by dissolving 215 grams of methanol, CH₃OH, in 1000.0 grams of water. What is the freezing point of the solution? (The freezing point depression constant for water is 1.86°C/mole solute in 1000 g of water.)

• A) -6.72°C
• B) -12.5°C
• C) -25.0°C
• D) -40.3°C

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Definitions:

Slope

The measure of the steepness or incline of a line, defined as the ratio of the change in the y-variable to the change in the x-variable.

Mean Value

The average of a set of numerical data, calculated by dividing the sum of all values by the number of values.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.

Independent Variable

In statistical analysis, a variable that is manipulated to observe its effect on another variable, often called the dependent variable.