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Results: Tub Ranking of reaction Iodine Test Benedict's Test e rate 1 2 3 4

Results: Tub Ranking of reaction Iodine Test Benedict's Test e rate 1 2 3 4

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Reagents: Saliva, 6 ml 1% starch solution, 6 drops I, in KI, 6 ml benedict's reagent. Materials: 12 Test tube (20 ml), 10 ml graduated cylinder, test tube rack, brush, 250 ml beaker, tripod, wire gauze, thermometer, alcohol lamp Procedure: 1. Prepare 6 test tubes and place 1 ml saliva in each. 2. Add 1ml water to tube 1,2 ml to tube 2, 4 ml to tube 3,6 ml to tube 4, 8 ml to tube 5 and 10 ml to tube 6. Mix thoroughly. 3. Transfer 1 ml of each into 6 separate test tubes (discard excess solution) and add 1 ml of 1% starch paste. Mix well and heat in a water bath with temperature maintained at 40°C for 30 minutes. 4. Divide each of the contents of each tube into 2 and test with: Iodine Test – to half of the content of each tube, add 1 drop of iodine in KI and note the color produced. Compare the intensity of color in each of the 6 tubes. b. Benedict's – to 1 ml benedict's reagent, add 5 drops of the other half of each tube and heat in a boiling water bath for 3 minutes. Note color of precipitate. - 5. Rank each tube according to decreasing reaction rate one (1) being the fastest to hydrolyze and 6 being the slowest.
Transcribed Image Text:Reagents: Saliva, 6 ml 1% starch solution, 6 drops I, in KI, 6 ml benedict's reagent. Materials: 12 Test tube (20 ml), 10 ml graduated cylinder, test tube rack, brush, 250 ml beaker, tripod, wire gauze, thermometer, alcohol lamp Procedure: 1. Prepare 6 test tubes and place 1 ml saliva in each. 2. Add 1ml water to tube 1,2 ml to tube 2, 4 ml to tube 3,6 ml to tube 4, 8 ml to tube 5 and 10 ml to tube 6. Mix thoroughly. 3. Transfer 1 ml of each into 6 separate test tubes (discard excess solution) and add 1 ml of 1% starch paste. Mix well and heat in a water bath with temperature maintained at 40°C for 30 minutes. 4. Divide each of the contents of each tube into 2 and test with: Iodine Test – to half of the content of each tube, add 1 drop of iodine in KI and note the color produced. Compare the intensity of color in each of the 6 tubes. b. Benedict's – to 1 ml benedict's reagent, add 5 drops of the other half of each tube and heat in a boiling water bath for 3 minutes. Note color of precipitate. - 5. Rank each tube according to decreasing reaction rate one (1) being the fastest to hydrolyze and 6 being the slowest.
Results: Tub Ranking of reaction Iodine Test Benedict's Test e rate 1 2 3 4 5 6.
Transcribed Image Text:Results: Tub Ranking of reaction Iodine Test Benedict's Test e rate 1 2 3 4 5 6.
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