Explain why the melting point of pure hexane is lower than that of pure cyclohexane when the two compounds have nearly the same molecular weight.
Explain why the melting point of pure hexane is lower than that of pure cyclohexane when...
8. a. Explain why the melting point of pure phthalic acid is higher than that of pure napthalene, when the two compounds have nearly the same molecular weight. b. Explain why the melting point of pure hexane is hgiher than that of pure cyclo-hexane, when the two compounds have nearly the same molecular weight. (Hint: reffer to structures)
Why does cyclohexane have a lower boiling point than toluene?
You may have noticed that % composition vs Melting Point graphs are given in % Mole not 96 Weight. This is because melting point depression is a colligative property (review in your general chemistry text) that depends on the moles of impurity, the same number of moles of impurity of two different compounds will cause the same melting point depression! Before the advent of mass spectrometry this was one of the techniques used to determine the molecular weight of compounds....
can you help with part b why isn't the product pure based on the melting point??? for part c the experiment was Separation of acid/base/neutral compounds using liquid- liquid extraction of benzocaine-trans-cinnamic acid and biphenyl what was the purpose of using Na2SO4 estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation,...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
Predict which pure substance will have the lower melting point, baking soda (NaHCO,) or phonol (C,H,OH)? Explain your answer Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help higher Phenol will have the compound melting point. The baking soda is an type of attractive force present, so is predicted to have a weakest and has the melting point lower strongest aromatic lonic
When determining the melting point of your pure benzophenone, some of the molten material had solidified high on the thermometer and wire stirrer. How would your calculated value for the molecular weight of your unknown been affected (high, low, no effect) if this benzophenone failed melt and was not a part of the final mixture in the tube?
why does compound a have a lower melting point? 4) Why does compound a have a lower melting point? (.5 pt) OH
Question 14 The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
Mandelic acid has two hydroxyl groups; yet its melting point is lower (119 oC) than the melting point of benzoic acid (122 oC). Explain.