Modul Praktikum - Klorinasi (DPC & Sisa Klor)

Summary

This video demonstrates an experiment to determine the Binding Capacity of Chlorine (DPC) using a set of chemical samples and a comparator. The process involves preparing different chlorine solutions in Erlenmeyer flasks, adding DPD reagent, and measuring residual chlorine levels after a 30-minute incubation in a dark environment. The results are analyzed by comparing the color of the samples against a blank solution using the comparator. This practical session provides insights into chlorine testing and colorimetric analysis for determining DPC values in water treatment applications.

Takeaways

• 😀 The experiment involves determining the DPC (Binding Capacity) using chlorine samples.
• 😀 Key materials needed include a comparator, DPD, and samples of chlorine.
• 😀 30 mL Erlenmeyer flasks are used for the experiment, with 50 mL of samples prepared for each test.
• 😀 The experiment requires the addition of chlorine solutions with varying concentrations (0.1 mL, 0.2 mL, and 0.3 mL) into separate flasks.
• 😀 The samples are mixed and left in a dark place for 30 minutes to allow for proper reaction.
• 😀 After 30 minutes, the remaining chlorine content in each sample is measured using the DPD method.
• 😀 Aquadest (distilled water) is used to fill the first test tube before the DPD tablet is added.
• 😀 The DPD tablet reacts with the chlorine in the sample, resulting in a pink color change.
• 😀 The color intensity is compared using a comparator to determine the residual chlorine levels.
• 😀 The DPC (Binding Capacity) of the sample is calculated based on the chlorine content measured.
• 😀 The experiment concludes with a comparison of results from different samples, showing the effectiveness of the binding capacity.

Q & A

What is the main goal of the laboratory experiment described in the transcript?

The main goal of the laboratory experiment is to determine the DPC (Daya Pengikat Club), or chlorine-binding capacity, of various samples using a series of chemical reactions and measurements.

What are the key materials needed for the experiment?

The key materials needed for the experiment are Erlenmeyer flasks (30 mL), chlorine samples of different concentrations (0.1 mL, 0.2 mL, 0.3 mL), DPD reagent, a comparator, aquadest (distilled water), and a timer.

How are the samples prepared for the experiment?

The samples are prepared by adding specific volumes of chlorinated water (0.1 mL, 0.2 mL, 0.3 mL) to separate Erlenmeyer flasks. The contents are then gently shaken to mix the chemicals.

What is the purpose of storing the samples in a dark place for 30 minutes?

The samples are stored in a dark place for 30 minutes to allow the chemical reactions to proceed without interference from light, which could alter the outcome of the experiment.

What happens when the DPD reagent is added to the samples?

When the DPD reagent is added to the samples, it reacts with the chlorine present, causing a color change. The intensity of the color indicates the concentration of residual chlorine in the sample.

What is the role of the comparator in this experiment?

The comparator is used to match the color of each sample with a color scale. This helps determine the concentration of chlorine in the sample by comparing the color intensity against predefined standards.

How do you use the comparator to measure residual chlorine in the samples?

To measure residual chlorine, the color of the sample is compared with that of the blank (a control with no chlorine). The color of the sample is adjusted to match the comparator scale, and the corresponding chlorine concentration is noted.

What is the significance of measuring residual chlorine in the experiment?

Measuring residual chlorine is crucial for determining the chlorine-binding power (DPC) of the samples, which reveals how well the samples are able to neutralize or bind chlorine.

What does the DPC value indicate about the samples?

The DPC value indicates the chlorine-binding capacity of each sample. A higher DPC means the sample is more effective at binding chlorine, while a lower DPC indicates less binding capacity.

What is the expected outcome after 30 minutes of incubation in the dark?

After 30 minutes of incubation in the dark, the chemical reactions in the samples should stabilize, allowing for an accurate measurement of the residual chlorine when the DPD reagent is added.