Question

hation by Freezing Point Depression Vernier Logger Pro for Windows Section Post-Laboratory Questions (Use the space provided and additional paper if necessary. Record your nemerical answers in the boxes provided.) 1. Obtain the correct molar mass of your unknown from your laboratory instructor. Calculate the percent error in the molar mass that you found. Torg/mol percent error, 2. A student determined the freezing point of pure t-butyl alcohol following the procedure given in this experiment. Because of an experimental error, the freezing point temperature that she obtained was higher than the correct value. Explain whether this error will lead to values of each of the following quantities that are larger or smaller than the correct values. (a) freezing point depression of the salicylic acid solution in t-butyl alcohol (b) molal freezing point depression constant of t-butyl alcohol 3. 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, explain whether this error will lead to larger or smaller values of each of the following quantities. (a) molality of the unknown solution (b) molar mass of the unknown O Cengage Learning

for question 1 the molar mass of unknown is 102g/mol