Carbohydrates

• Molisch's Test is a test for the presence of carbohydrates.
• The reagents for Molisch's Test is a-napthol and 95% ethanol.
• A purple ring indicates a positive result in a Molisch's Test.
• Iodine/KI Test is used for the presence of starch.
• The reagents for Iodine/KI Test is Iodine in Potassium iodide.
• A blue-black color indicates a positive result in Iodine/KI Test.
• Benedict's Test is for the presence of reducing sugars.
• The reagents for Benedict's Test are Na citrate, Na2CO3, Cu2O4 -5H20.
• An orange solution with reddish precipitate within three minutes indicates a positive result in a Benedict's Test.
• The Barfoed's Test is used for the presence of reducing monosaccharides.
• The reagents for Barfoed's Test are Cu(CH3COO)2 and acetic acid.
• A reddish precipitate within three minutes indicates a positive in a Barfoed's Test.
• A positive result in a Seliwanoff's Test means it is a ketose.
• A negative result in a Seliwanoff's Test means it is an aldose.
• The reagents for Seliwanoff's Test are resorcinol, concentrated HCl.
• A red solution indicates a positive result in a Seliwanoff's Test.
• A positive result in a Bial's Test indicates it is an pentose.
• A negative result in a Bial's Test indicates that it is a hexose.
• The reagents for the Bial's Test are orcinol, concentrated HCl, and FeCl3.
• A light blue solution indicates a positive reaction in a Bial's Test.
• Fehling's Test is used for the presence of reducing sugars and aldehydes.
• The reagents for a Fehling's Test are CuSO4 and NaOH.
• A red precipitate indicates a positive result in a Fehling's Test.
• Tollen's Test is used for the presence of aldehydes.
• A silver mirror indicates a positive result in a Tollen's Test.
• The reagents for Tollen's Test are AgNO3, ammonium hydroxide, and NaOH.
• A brick-red precipitate indicates a positive result in Benedict's Test.