Homework Help is Here – Start Your Trial Now!
Science
Chemistry
3. You acquired the following data: bp 173 °C; - Tollens', + iodoform tests; semicarbazone mp 105 °C. You are very confident that your unknown is 2- octanone. Data is spot on, excluding the semicarbazone mp. You suspect the suppressed mp is due to wet crystals. What process or technique (other than continued oven drying) can help you obtain more pure semicarbazone and thus a more accurate mp for comparison? Please write answer in box at right.

3. You acquired the following data: bp 173 °C; - Tollens', + iodoform tests; semicarbazone mp 105 °C. You are very confident that your unknown is 2- octanone. Data is spot on, excluding the semicarbazone mp. You suspect the suppressed mp is due to wet crystals. What process or technique (other than continued oven drying) can help you obtain more pure semicarbazone and thus a more accurate mp for comparison? Please write answer in box at right.

Chemistry
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...
See similar textbooks
icon
Related questions
Question

I only need help with questions three, please solve but always explain. I am not sure what the question is asking, and no other techniques come to mind when thinking about how to dry crystals more. 

mp range of semicarbazone Tollens' test aldehyde (control) unknown iodoform test acetone (control) unknown (circle one) + + + - (circle one) + - - 1 Your unknown is Write name below and draw structure in box at right Questions 1. There is one compound (that contains only one carbonyl group) that gives both a positive iodoform test and a positive Tollens' test. This compound is not included on the table of unknowns. Use your knowledge of the test to predict this compound and draw it in the provided box. Hint: the molecular weight of the compound is less than 60. HO 2. Draw the structure of a molecule, an unknown aldehyde or ketone listed in the tables, that would show a negative Tollens' test and a negative iodoform test. There is more than one correct answer. Draw one in box at right. Acetaldehyde H 여 Санио MW:44 2 Ñ 3. You acquired the following data: bp 173 °C; - Tollens', + iodoform tests; semicarbazone mp 105 °C. You are very confident that your unknown is 2- octanone. Data is spot on, excluding the semicarbazone mp. You suspect the suppressed mp is due to wet crystals. What process or technique (other than continued oven drying) can help you obtain more pure semicarbazone and thus a more accurate mp for comparison? Please write answer in box at right.
Transcribed Image Text:mp range of semicarbazone Tollens' test aldehyde (control) unknown iodoform test acetone (control) unknown (circle one) + + + - (circle one) + - - 1 Your unknown is Write name below and draw structure in box at right Questions 1. There is one compound (that contains only one carbonyl group) that gives both a positive iodoform test and a positive Tollens' test. This compound is not included on the table of unknowns. Use your knowledge of the test to predict this compound and draw it in the provided box. Hint: the molecular weight of the compound is less than 60. HO 2. Draw the structure of a molecule, an unknown aldehyde or ketone listed in the tables, that would show a negative Tollens' test and a negative iodoform test. There is more than one correct answer. Draw one in box at right. Acetaldehyde H 여 Санио MW:44 2 Ñ 3. You acquired the following data: bp 173 °C; - Tollens', + iodoform tests; semicarbazone mp 105 °C. You are very confident that your unknown is 2- octanone. Data is spot on, excluding the semicarbazone mp. You suspect the suppressed mp is due to wet crystals. What process or technique (other than continued oven drying) can help you obtain more pure semicarbazone and thus a more accurate mp for comparison? Please write answer in box at right.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Alkanes and Cycloalkanes
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS