14.
Boiling point of a contaminated solution will always be higher than the boiling point of pure solvent.
Out of the given option only one is showing boiling point higher than the original boiling point of pure one, 111-113
Answer = 111-113
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the...
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...
Question 16 For which molecule below, the melting point was reported wrong by student? 5 pts Compound A) Naphthalene B) Benzophenone C) D-Anisic acid D) 3-Chlorobenzoic Observed MP 79-80° 45-47° 178-182 acid 157 Question 17 5 pts
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 7 1 pts Choose the compound that should have the highest melting point according to the ionic bonding model. Cas Srse RbBr CaCl2
Question 18 1 pts A compound of interest has a theoretical melting point (MP) of 162-163 °C while its experimental MP was measured to be 157-161 °C. Which of the following statements reflects this observation? The compound of interest was not isolated as the MP range is not identical. The compound of interest was isolated but is slightly impure as the MP is slightly lower and has wider range. The compound of interest was not isolated as the MP had...
Powder (shor sten FUNNELS Fitering (long stem 63 Chapter 4 Melting Points, Boiling Points, and Refractive Indices Questions 1. What effect would poor circulation of the melting point bath liquid have on the observed melting point? 2. What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound? 3. Three test tubes, labeled A, B, and C, contain substances with approxi- mately the same melting points. How could you prove the...
Question 2 Salicylic acid, HC,H,0, is a chemical compound used in many facial cleansing products. Figure 2. Structure of Salicylic Acid a) Identify the ionizable hydrogen (HA or Hg) with the correct pk НА lonizable Hydrogen pK, 2.97 HA 13.7 :91 3 19- 10 b) The solubility of salicylic acid in water is 0.210-96 HC,HsOs by mass. What is the pH of an aqueous solution of salicylic acid at saturation? (Assume the density of the solution is 1.00 g/mL). 2-U...
1. [1 pt] What is the boiling point of compound A? Please round final answer to a whole number. Do not include units. °C 2. [1 pt] At what temperature will a solution consisting of 14 mole % A and 86 mole % B begin to boil? Please round final answer to a whole number. Do not include units. °C 3. [1 pt] Beginning at point X trace out the lines for one theoretical plate. What is the composition of...
Please determine the IDENTITY of the unknown compound and explain how each peak / data point from the following instruments led to that identification. What does the gcms indicate. Thank you very much! (The GCMS data is just a long set of numbers which is why the question appears so long). IR of unknown: NMR unknown Proton Graphs (first is overall graph, others that follow are zoomed in sections): NMR unknown Carbon Graphs (first is overall graph, others that follow...