cyclohexane solubility The refractive index of my unknown is __________________ Refractive Index (if completed): Unknown Identification Conclusion: The density, boiling point, solubility, and refractive index agree best with the compound _____________ which is my unknown # _________ . EXPERIMENT #3: USING PHYSICAL PROPERTIES TO DETERMINE THE IDENTITY OF AN UNKNOWN Post -Lab Based on your experiences with high altitude directions in cooking, pressure cookers, the textbook, and anything else you might know, would you expect the boiling points of these materials to be higher or lower if one conducted this experiment at the top of If you Pike’s Peak? have actual experience with the high altitude cooking directions, just wander into a store and don’t read a few boxes. Explain your reasoning. When determining the volume of an unknown, a student read the volume at the top of the meniscus rather than the bottom. Would this error increase, decrease, or not affect the measured volume? Explain your reasoning. If the student used the volume read in question 3 to calculate the density of the material, would the calculated density be high, low, or the same compared to the actual value? Explain your reasoning. Use the back of the page if necessary. Suppose in determining the density of an unknown the student measured the volume correctly but forgot to zero the balance before recording the mass. If the balance was reading -0.50 g before the student placed the object on the balance, how would the mistake of not zeroing the balance affect the calculated density? Explain your reasoning. Use the back of the page if necessary. This page is intentionally left blank.
cyclohexane solubility Refractive Index (if completed): The refractive index of my unknown is __________________ Unknown Identification Conclusion: The density, boiling point, solubility, and refractive index agree best with the compound _____________ which is my unknown # _________ . EXPERIMENT #3: USING PHYSICAL PROPERTIES TO DETERMINE THE IDENTITY OF AN UNKNOWN Post -Lab Based on your experiences with high altitude directions in cooking, pressure cookers, the textbook, and anything else you might know, would you expect the boiling points of these materials to be higher or lower if one conducted this experiment at the top of Pike’s Peak? If you don’t have actual experience with the high altitude cooking directions, just wander into a store and read a few boxes. Explain your reasoning. When determining the volume of an unknown, a student read the volume at the top of the meniscus rather than the bottom. Would this error increase, decrease, or not affect the measured volume? Explain your reasoning. If the student used the volume read in question 3 to calculate the density of the material, would the calculated density be high, low, or the same compared to the actual value? Explain your reasoning. Use the back of the page if necessary. Suppose in determining the density of an unknown the student measured the volume correctly but forgot to zero the balance before recording the mass. If the balance was reading -0.50 g before the student placed the object on the balance, how would the mistake of not zeroing the balance affect the calculated density? Explain your reasoning. Use the back of the page if necessary. This page is intentionally left blank.