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If all the ice were to melt just as the temperature reached 3.0 °C, would this produce an error in your experimental values? Explain your reasoning
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- Having too much sample can cause an inaccurate melting point .under these circumstances how will the observed melting point compare with the true melting point ?1) When comparing plain water to salt water, which will have higher surface tension? Cite evidence that supports your choice. 2) When comparing plain water to sugar water, which will have higher surface tension? Cite evidence that supports your choice. 3) What is the dependent variable in this experiment, and what is the independent variable in this experiment? Also, what other variables, besides the independent and dependent, will you try to hold constant as you conduct this experiment?What is the advantage of using Buchner filtration in filtering crystals? Q4. Briefly explain how scratching the wall of the glass flask can help formation of crystals.
- Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)Using Dalton’s Law of Partial Pressure, explain how steam distillation is a useful technique for heat sensitive substances such as essential oils.Explain the difference between constant rate filtration and constant pressure difference filtration using mathematics and examples. When might either of these procedures be used in conjunction with filtration?
- What effect does the presence of impurity have on the melting point?Examine the above photo showing the four solvents and record your observations of the physical appearance of all four samples.suppose your flask was heated for several minutes after all the unknown liquid had been vaporized. explain what effect, if any, this would have on your experimentally determined molar mass?
- What is the relationship between vapor pressure at a temperature and its melting point so that sublimation can occur? What are the different phase changes involved in the purification using sublimation experiment?1.) While determining the pressure during the Dumas experiment, if the barometric pressure reported were lower than the actual vapor pressure (Part I), how would this error affect the calculated molar mass of the unknown volatile liquid? Explain.Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.