UncategorizedFehling Test – Objectives and Common Uses

Fehling Test – Objectives and Common Uses

Fehling Test

Fehling Test – Objectives: The Fehling Test is a chemical test that is used to determine the presence of reducing sugars. The test is performed by adding a drop of Benedict’s Solution to a sample of the substance being tested. If the substance contains a reducing sugar, the Benedict’s Solution will change color from blue to red.

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    Fehling Test – Objectives and Common Uses

    Objectives and common uses of the Fehling Test are available for a free download at Infinity Learn

    The Fehling Test used to determine the presence of reducing sugars in a solution. The test uses copper sulfate and alkali to produce a blue-green color in the presence of reducing sugars. The intensity of the color used to determine the amount of reducing sugar in the solution.

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    Objectives of the Fehling Test

    The Fehling Test a biochemical assay used to determine the presence of reducing sugars. The assay is based on the reduction of Cu2+ to Cu+ by the reducing sugar. The Cu+ then detected by its ability to form a blue complex with the reagent Fehling A.

    The Fehling Solution

    The Fehling Solution a chemical test used to determine the presence of reducing sugars. The solution made up of copper sulfate and sodium hydroxide. When a reducing sugar is present, it will reduce the copper sulfate to copper metal. This will cause a blue-green color to develop in the solution.

    Process of Fehling Test

    The Fehling Test a simple test used to determine whether a sugar is present in a solution. A copper sulfate solution added to a sugar solution. If a sugar is present, it will react with the copper sulfate to form a copper sugar complex. The presence of this complex can easily detected by its characteristic blue color.

    Reactions of Fehling’s Test

    A positive reaction for the presence of aldehydes or ketones in a sample will result in a brick-red precipitate. However the presence of a sugar will not cause a reaction.

    Common Uses of Fehling’s Test

    One common use of Fehling’s test is to determine the presence of sugar in a substance. This is because sugar can react with the Fehling’s solution to produce a red precipitate.

    Uses of Fehling Test

    The Fehling Test used to determine the presence of reducing sugars in a sample. The test uses copper (II) sulfate and alkaline potassium tartrate to form a red-orange precipitation when reducing sugars are present in the sample.

    Principle/Aim of the Fehling Test

    The principle of the Fehling Test is that aldehydes and ketones reduce Cu2+ ions to Cu+ ions in the presence of an alkali. Therefore the presence of aldehydes or ketones in a substance can detected by the presence of a blue precipitate.

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