tugas kimia praktik hukum kekekalan massa/hukum lavoisier

Summary

In this video, Zahra from SMA Negeri 17 Makassar demonstrates an experiment to prove the Law of Conservation of Mass, also known as Lavoisier's Law. The experiment uses vinegar (acetic acid) and baking soda (sodium bicarbonate) to showcase the reaction that produces carbon dioxide, water, and sodium acetate. Zahra carefully measures the mass of the materials before and after the reaction using a digital scale, showing that the total mass remains constant. The experiment effectively confirms Lavoisier's Law, which states that in a closed system, mass remains unchanged before and after a reaction.

Takeaways

• 😀 The script introduces Zahra, a student from SMA Negeri 17 Makassar, conducting an experiment to demonstrate the Law of Conservation of Mass.
• 😀 The Law of Conservation of Mass, also known as Lavoisier's Law, was formulated by Antoine Lavoisier and states that mass in a closed system remains constant before and after a reaction.
• 😀 Zahra explains that the experiment aims to prove this law by observing the reaction between vinegar (acetic acid) and baking soda (sodium bicarbonate).
• 😀 The experiment involves using a transparent bottle, a balloon, and a digital scale, with vinegar and baking soda as the main reactants.
• 😀 The first step is to fill the bottle with vinegar and measure its mass, which is 200 grams.
• 😀 The second step is to place baking soda into the balloon and weigh it, recording a mass of 5 grams.
• 😀 The initial total mass of the system (bottle + baking soda in the balloon) is 205 grams.
• 😀 The next step involves inserting the balloon into the bottle and allowing the chemical reaction to occur, where vinegar reacts with baking soda, producing carbon dioxide gas, water, and sodium acetate.
• 😀 After the reaction, Zahra measures the mass of the combined bottle and balloon, which remains at 205 grams, demonstrating that the total mass is conserved.
• 😀 The conclusion of the experiment confirms that the mass before and after the chemical reaction remains the same, validating Lavoisier's Law of Conservation of Mass.

Q & A

What is the main objective of the experiment described in the transcript?

The main objective of the experiment is to demonstrate Lavoisier's Law of Conservation of Mass, which states that the mass of substances before and after a reaction in a closed system remains constant.

Who formulated Lavoisier's Law of Conservation of Mass?

Lavoisier's Law of Conservation of Mass was formulated by Antoine Lavoisier, who is known as the Father of Modern Chemistry.

What substances are used in the experiment?

The substances used in the experiment are vinegar (acetic acid) and baking soda (sodium bicarbonate).

What equipment is needed for this experiment?

The equipment needed includes a transparent bottle, a balloon, and a digital scale.

How do you begin the experiment?

The experiment begins by filling the transparent bottle with vinegar and weighing it to determine the initial mass.

How is the amount of baking soda measured in the experiment?

The amount of baking soda is measured by placing it inside a balloon, and the balloon is then weighed to determine the mass of the baking soda.

What happens when the baking soda is added to the vinegar?

When baking soda is added to vinegar, a chemical reaction occurs, producing carbon dioxide gas, which inflates the balloon.

What does the experiment aim to show regarding mass?

The experiment aims to show that the mass before and after the reaction remains the same, supporting Lavoisier's Law of Conservation of Mass.

What is the final result of the experiment regarding mass?

The final mass after the reaction is the same as the initial mass, which is 205 grams, demonstrating that mass is conserved during the reaction.

What conclusion can be drawn from the experiment?

The conclusion is that the mass of substances in a closed system remains unchanged before and after a reaction, confirming the validity of Lavoisier's Law of Conservation of Mass.