Praktikum Kimia Fisika - Termokimia

Summary

This video is a practical chemistry lesson focused on thermochemistry experiments. The session explains how to use equipment such as calorimeters, thermometers, and various chemicals like hydrochloric acid, sodium hydroxide, and copper sulfate. It covers steps for measuring temperature changes during chemical reactions, including the use of a calorimeter for temperature observation. The experiment involves heating water, mixing it with cold water, and tracking the resulting temperature. The instructor encourages students to take note of the reactions and submit their reports with proper analysis and answers to additional questions.

Takeaways

• 😀 The video introduces a thermochemistry experiment related to calorimetry.
• 😀 The materials and equipment used in the experiment include chemical glassware, calorimeters, thermometers, a spirit burner, and more.
• 😀 The substances for the experiment include hydrochloric acid, sodium hydroxide, copper(II) sulfate, aluminum sulfate, ammonia solution, distilled water, and copper(II) sulfate pentahydrate.
• 😀 Before the experiment, the chemicals are weighed using a pycnometer, and the empty pycnometer is also weighed first.
• 😀 The first step involves heating distilled water to 60°C to determine the calorimeter’s capacity.
• 😀 A stopwatch is used to measure the temperature of cold and hot water at different times: cold water at minutes 13 and 5, and hot water at minutes 24 and 60.
• 😀 At minute 7, the cold and hot water are mixed in the calorimeter.
• 😀 The temperature of the mixture inside the calorimeter is measured at minutes 9 and 10.
• 😀 This temperature measurement method will be used for further procedures in the thermochemistry experiment.
• 😀 The video concludes with instructions to submit reports on time and to discuss any reactions observed during the experiment.

Q & A

What is the main focus of the practical session described in the script?

The main focus of the practical session is on thermochemistry, specifically involving the use of a calorimeter to measure heat transfer and reactions in chemical processes.

What equipment is used in this thermochemistry practical session?

The equipment used includes a beaker, calorimeter, thermometer, iPad, spatula, measuring cup, spirit burner, tripod, clamp stand, and balance.

What substances are used in the experiment?

The substances used in the experiment include hydrochloric acid (0.05 M), sodium hydroxide (0.05 M), copper(II) sulfate (0.05 M), aluminum sulfate (0.08 M), ammonia solution (0.08 M), distilled water, and copper(II) sulfate pentahydrate.

How is the empty pycnometer used during the experiment?

Before measuring the substances, the pycnometer is first weighed when empty to ensure accurate measurement of the substances used in the experiment.

What is the first step to determine the capacity of the calorimeter?

The first step is to heat distilled water to a temperature of 60°C, after which the temperatures of both cold and hot water are measured at specific intervals.

At what times are the temperatures of the cold and hot water measured?

The temperature of the cold water is measured at minute 13 and minute 5, while the temperature of the hot water is measured at minute 24 and minute 60.

What happens during the mixing of hot and cold water in the calorimeter?

At minute 7, cold and hot water are mixed in the calorimeter, and the temperature of the mixture is observed at minute 9 and 10.

What is the method of temperature measurement used in this practical session?

The method involves using a thermometer to measure the temperatures of cold water, hot water, and their mixture in the calorimeter at various times during the experiment.

What is expected of students after completing the practical?

After completing the practical, students are expected to submit their reports on time, and they are encouraged to identify any reactions that occurred during the experiment and discuss them in the report.

What should students do if they encounter additional questions in the module?

Students should answer and complete any additional questions in the module, incorporating them into their report as required.