Praktikum Pemeriksaan Boraks Menggunakan Boraks Test Kit

Summary

This video demonstrates a practical experiment to test for the presence of borax in food, specifically round tofu, using various laboratory tools. The process begins by finely grinding the tofu and extracting its essence with water. The sample is then tested with borax reagents using Curcuma paper. The paper's color change (green-black indicates borax presence, while red-brown shows absence) reveals whether the sample contains borax. The procedure is explained step-by-step, including the preparation of materials and the final result, showcasing how to effectively identify borax in food products.

Takeaways

• 😀 The purpose of the experiment is to detect the presence of borax in food samples.
• 😀 The equipment used includes a mortar and pestle, beaker, measuring glass, analytical balance, aluminum foil, spoon, knife, pipette, and stirrer.
• 😀 The materials used for the experiment include turmeric paper, borax reagents (1 and 2), distilled water (aquades), and round tofu as the sample.
• 😀 The first step is to slice the tofu and then place it in a mortar to be ground into a fine paste.
• 😀 The grinding process is essential to extract the substances needed for the test.
• 😀 After grinding, 10 grams of tofu is weighed using an analytical balance.
• 😀 The tofu is then placed in a freezer for a specified period before adding 50 mL of distilled water (aquades).
• 😀 The mixture is stirred, and turmeric paper is prepared to test for borax presence.
• 😀 The first borax reagent is added to the turmeric paper, and the sample is then dropped onto the paper.
• 😀 The paper is dried by either sun exposure or using an oven, then the second borax reagent is added to confirm the result.
• 😀 A color change on the turmeric paper indicates the presence of borax—greenish-black means positive, while reddish-brown means negative.
• 😀 The experiment concludes with the result that the tofu sample tested negative for borax.

Q & A

What is the purpose of the practical session mentioned in the transcript?

The purpose of the practical session is to test for the presence of borax in food samples.

Which tools are used in the borax detection experiment?

The tools used include a mortar and pestle, beaker, measuring glass, analytical balance, aluminum foil, spoon, knife, pipette, and stirrer.

What are the main ingredients or reagents used in the experiment?

The main ingredients or reagents used are Curcuma paper, borax reagent 1, borax reagent 2, aquades (distilled water), and the food sample, which in this case is round tofu.

What is the first step in the experiment?

The first step is to slice the tofu and then crush it using a mortar and pestle to produce an extract.

Why is aquades added to the crushed tofu during the experiment?

Aquades is added to the crushed tofu to help create an extract that can be tested for borax.

How much tofu is used in the experiment?

Approximately 10 grams of tofu is used in the experiment.

What happens after the tofu is weighed and mixed with aquades?

After weighing and mixing with aquades, the tofu is placed in a freezer for 2 minutes before moving on to the next step.

What is the role of Curcuma paper in the experiment?

Curcuma paper is used as a medium to test for borax. A few drops of borax reagent are added to it for the detection process.

What do the color changes on the Curcuma paper indicate?

A color change to greenish-black on the Curcuma paper indicates the presence of borax, while a color change to reddish-brown indicates the absence of borax.

What are the possible results of the borax detection test on tofu?

The result could either show a positive indication (greenish-black color) for borax presence, or a negative result (reddish-brown color) indicating no borax in the tofu sample.