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Give the wet ) that work for ALDE HY DES only. chemical tests (#1-6

Give the wet ) that work for ALDE HY DES only. chemical tests (#1-6

World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter20: Organic Chemistry
Section: Chapter Questions
Problem 38A
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**Title: Wet Chemical Tests for Aldehydes** **Description:** In analytical chemistry, it’s often important to identify functional groups within a compound. For aldehydes, specialized tests can confirm their presence. Here are six wet chemical tests that are specifically effective for aldehydes: 1. **Tollens' Test:** - Detects the presence of an aldehyde based on the reduction of silver ions to metallic silver. 2. **Fehling's Test:** - Utilizes a copper(II) solution that is reduced to copper(I) oxide, which precipitates as a red solid. 3. **Benedict's Test:** - Similar to Fehling's test, it helps identify reducing sugars and aldehydes via a color change. 4. **Schiff's Test:** - Involves the reaction of aldehydes with Schiff’s reagent, leading to a color change to magenta. 5. **Iodoform Test:** - Although typically used for methyl ketones, it can occasionally identify secondary alcohols and aldehydes that yield iodoform. 6. **Chromic Acid Test:** - Uses chromic acid as an oxidizing agent; aldehydes are oxidized to carboxylic acids, changing the solution color from orange to green. These tests are essential tools in determining the presence of aldehydes in chemical analysis and can be performed in a laboratory setting for accurate identification. **Note:** Visual aids or diagrams typically accompany these descriptions, depicting chemical equations and reaction mechanisms.
Transcribed Image Text:**Title: Wet Chemical Tests for Aldehydes** **Description:** In analytical chemistry, it’s often important to identify functional groups within a compound. For aldehydes, specialized tests can confirm their presence. Here are six wet chemical tests that are specifically effective for aldehydes: 1. **Tollens' Test:** - Detects the presence of an aldehyde based on the reduction of silver ions to metallic silver. 2. **Fehling's Test:** - Utilizes a copper(II) solution that is reduced to copper(I) oxide, which precipitates as a red solid. 3. **Benedict's Test:** - Similar to Fehling's test, it helps identify reducing sugars and aldehydes via a color change. 4. **Schiff's Test:** - Involves the reaction of aldehydes with Schiff’s reagent, leading to a color change to magenta. 5. **Iodoform Test:** - Although typically used for methyl ketones, it can occasionally identify secondary alcohols and aldehydes that yield iodoform. 6. **Chromic Acid Test:** - Uses chromic acid as an oxidizing agent; aldehydes are oxidized to carboxylic acids, changing the solution color from orange to green. These tests are essential tools in determining the presence of aldehydes in chemical analysis and can be performed in a laboratory setting for accurate identification. **Note:** Visual aids or diagrams typically accompany these descriptions, depicting chemical equations and reaction mechanisms.
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