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i just had a lab on filtration. If possible can you please help me with this tab

ID: 900702 • Letter: I

Question

i just had a lab on filtration. If possible can you please help me with this table?

C. Filtration

Materials: Funnel, filter paper, 50-mL graduated cylinder, test tubes (3), test tube rack, test tube

holder, stirring rod, droppers, two 150-mL beakers, boiling water bath, powdered

charcoal, iodine reagent, 0.1 M AgN03, Benedict's solution

To the mixture of glucose, NaCl, and starch from part B, add a small amount of powdered charcoal.

Fold a piece of filter paper in half and in half again. Open the fold to give a cone-like shape and

place the filter paper cone in a funnel. Push it gently against the sides and moisten with water. Place

a small beaker under the fu nnel. Pour the mixture into the filter paper. Collect the liquid (filtrate)

that passes through the filter.

Figure 2 Filtering a mixture

C.1 Describe what you see in the filter paper.

C.2 Test the liquid in the beaker (filtrate) for chloride, starch, and glucose using the identification tests

from part A. Compare the results of each test to part A. Use the test results to identify the substances

that passed through the filter paper.

C.3 From the test results, determine what was trapped in the filter and what passed through. Identify the

substance that is a suspension.

C.1 Appearance of filter paper___________________________________________

Substance present ________________________________________________

C.3 Which substance is a suspension?_______________________________________

Which substances are solutions or colloids?______________________________________

C.2 TEST FOR RESULTS OF TEST SUBSTANCE PRESENT IN FILTRATE? CI- STARCH GLUCOSE

Explanation / Answer

Active charcoal carbon filters are most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water. They are not effective at removing minerals, salts, and dissolved inorganic compounds.

C.1 Appearance of filter paper: Black with white colored insoluble starch

Substance present : Cl- and insoluble starch

Generally, Benedict's test will detect the presence of aldehydes, and alpha-hydroxy-ketones, including those that occur in certain ketoses. A positive test with Benedict's reagent is shown by a colour change from clear blue to a brick-red precipitate.

C.3 Which substance is a suspension? Starch is a suspension.

Which substances are solutions or colloids? Glucose and NaCl are water soluble, which are in solutions.

C.2 TEST FOR RESULTS OF TEST SUBSTANCE PRESENT IN FILTRATE? CI- No AgCl Precipitate No Cl- ions STARCH No Starch-Iodine complex No starch GLUCOSE Positive Benedict's test It contains glucose