A. List the five tests from your lab report and answer positive or negative for the following compound. B. What visible change would you see in a positive test?
A. List the five tests from your lab report and answer positive or negative for the following compound. B. What visible change would you see in a positive test?
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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Using the five test Barfoed, Seliwanoffs, Benedicts, Molisch's, and Iodine.
Transcribed Image Text:**Instructions:**
A. List the five tests from your lab report and indicate whether each test is positive or negative for the following compound.
B. What visible change would you see in a positive test?
**Diagram Explanation:**
The image depicts the chemical structure of a compound with the following groups:
- Three hydroxyl groups (-OH) are attached to the carbon chain.
- One aldehyde group (–CHO) is present at the end of the chain.
This structure suggests that the compound is likely an aldehyde with multiple hydroxyl groups. The compound could undergo various tests such as:
1. **Tollens' Test**: Typically gives a positive result with aldehydes.
- **Visible Change**: Formation of a silver mirror on the inside of the test tube.
2. **Fehling's Test**: Also used for aldehydes.
- **Visible Change**: A red precipitate forms if the test is positive.
3. **Benedict's Test**: Tests for reducing sugars, which may result in a positive test.
- **Visible Change**: A color change to orange-red, indicating a positive result.
4. **Iodoform Test**: May give a positive result if a methyl ketone is present.
- **Visible Change**: Formation of a yellow precipitate.
5. **Chromic Acid Test (Jones Test)**: Used for primary and secondary alcohols.
- **Visible Change**: A color change from orange to green if positive.
These tests help identify functional groups and specific properties of the given compound.
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