4CHO03/UM1: Fundamentals of... Introduction Perhaps the cleanest method of conducting an oxidation is by catalytic oxidation, since this minimizes the problem of removal of unwanted by- products. However, the conditions used are often vigorous and require the use of specialized equipment. By comparison, the product of a “chemical" oxidation may be more difficult to purify due to the presence of the reduced form of the oxidizing agent and potential "tars" that may arise from “over- oxidation". Because chemical oxidation can be carried out using conventional equipment they are more popular. dissolving sodium or potassium dichromate in acid is a commonly used oxidizing agent, being classed as a relatively powerful oxidant and having water soluble by-products (Cr III salts). Sulphuric acid is generally used if the material to be oxidized is water soluble and glacial acetic acid is used if it is Chromic acid, prepared in-situ by not. Alcohols are readily oxidized to carbonyl compounds by chromic acid. Secondary alcohols are oxidized to ketones and primary alcohols give aldehydes which are themselves in turn oxidized further to carboxylic acids. The purpose of this experiment is to demonstrate the oxidation of cyclohexanol to cyclohexanone and improve your laboratory skills in preparative organic chemistry. Procedure Place an aliquot of distilled water (30ml) into a 100ml round bottomed flask (placed on a cork ring). Carefully measure out 10ml of concentrated sulphuric acid in a dry measuring cylinder and slowly add it to the round bottomed flask.
4CHO03/UM1: Fundamentals of... Introduction Perhaps the cleanest method of conducting an oxidation is by catalytic oxidation, since this minimizes the problem of removal of unwanted by- products. However, the conditions used are often vigorous and require the use of specialized equipment. By comparison, the product of a “chemical" oxidation may be more difficult to purify due to the presence of the reduced form of the oxidizing agent and potential "tars" that may arise from “over- oxidation". Because chemical oxidation can be carried out using conventional equipment they are more popular. dissolving sodium or potassium dichromate in acid is a commonly used oxidizing agent, being classed as a relatively powerful oxidant and having water soluble by-products (Cr III salts). Sulphuric acid is generally used if the material to be oxidized is water soluble and glacial acetic acid is used if it is Chromic acid, prepared in-situ by not. Alcohols are readily oxidized to carbonyl compounds by chromic acid. Secondary alcohols are oxidized to ketones and primary alcohols give aldehydes which are themselves in turn oxidized further to carboxylic acids. The purpose of this experiment is to demonstrate the oxidation of cyclohexanol to cyclohexanone and improve your laboratory skills in preparative organic chemistry. Procedure Place an aliquot of distilled water (30ml) into a 100ml round bottomed flask (placed on a cork ring). Carefully measure out 10ml of concentrated sulphuric acid in a dry measuring cylinder and slowly add it to the round bottomed flask.
Chapter22: Bulk Electrolysis: Electrogravimetry And Coulometry
Section: Chapter Questions
Problem 22.20QAP
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