Question

I just had a lab on Identification Tes, but i ha some difficulty to understand. If possible can you please help me with this table?

A. Identification Tests

Materials: Three small beakers (100-150 mL), test tubes (6), test tube rack, stining rod,

50-mL graduated cylinder, test tube holder, droppers, boiling water bath, 1 % starch,

10% NaCl, 0.1 M AgN03, 10% glucose, Benedict's reagent, iodine reagent. Dropper

bottles ivith these reagents may be available in the laboratory.

In this experiment, you will perform the identification tests for c1-, glucose, and starch. To determine the

presence or absence of ci-, glucose, or starch in later experiments, refer to the results of the tests. For

each test, observe and record the initial properties of the reagent and the final appearance of the solution

after the reagent is added. In a positive test, there will be a change in the original properties of the

reagent, such as a color change and/or the formation of a precipitate (opaque solid). If there is no change

in the appearance of the reagent, the test is negative.

Caution: AgN03 and iodine reagent stain!

A.1 Chloride (Cr) test Place 3 mL of 10% NaCl in a test tube. Place 3 mL of distilled water in another

test tube. The test tube with the water will be the control or comparison sample. Test for ci- by

adding 2 drops of 0.1 M AgN03 to each. Record your observations. Compare the results for the

NaCl solution with the results for the water sample.

A.2 Starch test Place 3 mL of 1 % starch solution in a test tube. Place 3 mL of distilled water in

another test tube. Add 2-3 drops of iodine reagent to each. Record your observations. Compare the

results for the starch sample with the results for the water sample.

A.3 Glucose test Place 3 mL of 10% glucose solution in a test tube. Place 3 rnL of distilled water in

another test tube. Add 3 mL of Benedict's reagent to the glucose and to the distilled water. Heat

both test tubes in a boiling water bath for 5 minutes. Record your observations. Compare the results

for the glucose with the results for the water sample. Note: Each time you carry out the glucose

test, the test tubes containing Benedict's reagent must be heated in a boiling water bath.

TEST	REAGENT ADDED	RESULTS OF POSITIVE TEST	RESULTS WITH WATER CONTROL
A.1 CI-	AgNO3
A.2 starch	IODINE
A.3 GLUCOSE	BENEDICT'S HEAT