1. A student determined the freezing point of pure t -butyl alcohol by following
ID: 817939 • Letter: 1
Question
1. A student determined the freezing point of pure t-butyl alcohol by following the procedure given in this experiment. Because of an experimental error, the freezing point temperature she obtained was higher than the correct value. Will this cause the following values to be larger or smaller? Enter 1 for "larger" and 2 for "smaller".
a. freezing point depression of the salicylic acid solution in t-butyl alcohol
b. molal freezing point depression constant of t-butyl alcohol
2. While determining the molar mass of the unknown in Part III of the experiment, another student obtained a freezing point depression that was larger than the correct value. Assuming no other mistakes, will this error cause the following values to be larger or smaller? Explain your answer.
a. molality of the unknown solution
Click "larger" or "smaller"
Explain.
b. molar mass of the unknown
Click "larger" or "smaller".
Explain.
3. Write an Error of Measurement section for this experiment. An example can be found on Blackboard in the Sample Lab Report. To get full credit, you must list five valid errors of measurement, not personal mistakes.
Submit your cooling curves (3) in class. Make sure they are properly titled and labeled.
1. A student determined the freezing point of pure t-butyl alcohol by following the procedure given in this experiment. Because of an experimental error, the freezing point temperature she obtained was higher than the correct value. Will this cause the following values to be larger or smaller? Enter 1 for "larger" and 2 for "smaller".
a. freezing point depression of the salicylic acid solution in t-butyl alcohol
b. molal freezing point depression constant of t-butyl alcohol
2. While determining the molar mass of the unknown in Part III of the experiment, another student obtained a freezing point depression that was larger than the correct value. Assuming no other mistakes, will this error cause the following values to be larger or smaller? Explain your answer.
a. molality of the unknown solution
Click "larger" or "smaller"
Explain.
b. molar mass of the unknown
Click "larger" or "smaller".
Explain.
3. Write an Error of Measurement section for this experiment. An example can be found on Blackboard in the Sample Lab Report. To get full credit, you must list five valid errors of measurement, not personal mistakes.
Submit your cooling curves (3) in class. Make sure they are properly titled and labeled.
Explanation / Answer
1. A student determined the freezing point of pure t -butyl alcohol by following
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