2. Three samples labelled R, S, and T possess identical melting points: ~99 °C. When a 75/25 mixture of S and T is prepared, its melting point is 90-95 °C. The melting point of a 50/50 mixture R and T is 79-91 °C. The mp. of a 25/75 mixture of R and S is 97-98 °C. What information does this does this tell you about identity of the 3 compounds? (ie. Which compounds are the same, and which compounds are different? Use only the information you have learned from the slides and your lab manual.) Wht would you expect as a melting range for a 75/25 mixture of R and T?

2. Three samples labelled R, S, and T possess identical melting points: ~99 °C. When a 75/25 mixture of S and T is prepared, its melting point is 90-95 °C. The melting point of a 50/50 mixture R and T is 79-91 °C. The mp. of a 25/75 mixture of R and S is 97-98 °C. What information does this does this tell you about identity of the 3 compounds? (ie. Which compounds are the same, and which compounds are different? Use only the information you have learned from the slides and your lab manual.) Wht would you expect as a melting range for a 75/25 mixture of R and T?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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please answer number 1
Give the classification of the following alcohols as to primary, secondary, or tertiary. 1. U (CHals-C- OH RSITY 2. CH3- CH2-CH2-CH2-OH 1907 CH3-(CH2)2-CH -OH CH3- CH2-OH (CH3)2-CH -OH 1. 3. 4. 5.
1. Classify the molecule as being saturated or unsaturated. Give a reason for your answer. 2.Classify the Carbon (marked with *) as being 1^0, 2^0, 3^0. State a reason for your classification.
Name the following compounds using the IUPAC system
Which of the following structures have the lowest boiling point? a. (CH3)3-C-CH2-CH2-CH3 b. CH3-CH-CH=CH2 | CH 3 с. Но d. CH 3 e. CH3 CH₂ C-CH-CH3 | | Br Cl f. i CH3-C–CH2-CH3 8. CH3CH(CH3)CH2CHO
Refer to the list of compounds shown below when answering questions 5(a) to 5(e). Assume that the temperature (20 oC) is the same for all compounds. a.) A mixture of structures II and IV has a 12% excess of structure II. How much of structure II is in the mixture? (b) A mixture of structures II and IV has a 28% excess of structure II. How much of structure IV is in the mixture? (c)) Determine the optical purity of a mixture containing 40% structure I and 60% structure III. (d) A mixture of structures I and III gives an observed rotation of +13.6o. If the specific rotation of a pure sample of structure I is +31.3 o, what is the optical purity of the mixture? (e) A pure sample of structure IV has a specific rotation of +16.1o. If the ee of a mixture of structures II and IV is 25.0 %, what is the observed rotation (α) of the solution?
4) A pair of students fractionally distilled a 2:1 mixture of hexane and heptane while another pair fractionally distilled a 1:2 mixture of hexane and cyclohexane. Which pair achieved a more complete separation of the two components? Explain briefly by considering the given boiling points - Hexane: 60°C; Cyclohexane:80°C; and Heptane: 98°C
number 3
Search Animations Slide Show Review View Help A Viewing E Share A A =、而 ... halle Identify primary / secondary / tertiary alcohols HO OH но R, R, R-C-OH Ri С-ОН H 10 primary alcohol 20 secondary alcohol 30 tertiary alcohol Help Improve Office A Notes 19 nols.pptx -. ho pause break scroll 16 f8 F9 f1o F11 f12
please answer number 2
for the second question please make sure it is the SYSTEMATIC name.
In what proportion should alcohols of 80% and 35% strengths be mixed to make60% alcohol?