1. A student mistakenly used an ethanol solution containing an unknown ionic compound in Part C (part c is experiment to determine the van't Hoff factor for a strong unknown electrolyte) of the experiment. How would this affect the van't Hoff factor determined experimentally? Justify your answer with an explanation.
2. In Step 5 ( step 5 instruction is add approximately 15-20ml of distilled water to a 20 by 200mm test tube) of the experiment, a student mistakenly used 0.050 M HCl solution instead of distilled water. His lab partner performed the remaining parts of the experiment and used distilled water as instructed.
A. Would the molar mass of the unknown determined by this group of students in Part ( part B is experiment to determine the freezing point of a non electrolyte) be higher or lower than the correct value? Justify your answer with an explanation.
B. Would the van't Hoff factor determined by this group of students in Part C be higher or lower than the correct value? Justify your answer with an explanation.
3. In a general chemistry lab, a student accidentally added CaCl2 into the carboy containing distilled water to be used by all students.
A. Would the molar mass of the unknown determined in Part B be higher or lower than the correct value? Justify your answer with an explanation.
B. Would the van't Hoff factor determined in Part C be higher or lower than the correct value? Justify your answer with an explanation.