PRAKTIKUM FAKTOR-FAKTOR LAJU REAKSI (Suhu dan Katalis) Oleh Najwa Patiha Anwar Kelas 11 MIPA 4

Summary

In this practical experiment, Najwa Fatihah Yordan, a student from class 11 IPA 4, explores factors influencing reaction rates, focusing on temperature and catalysts. She demonstrates how increased temperature accelerates molecular movement, leading to more frequent collisions and faster reactions. The experiment also examines the role of a catalyst, using vinegar and bleach to observe which mixture reacts first. Najwa concludes that higher temperatures enhance reaction rates and that catalysts like vinegar expedite processes without altering their chemical structure. The presentation effectively illustrates key chemistry concepts through hands-on experimentation.

Takeaways

• 😀 Reaction rate refers to the change in concentration of reactants over a specific time period.
• 😀 There are five main factors that influence reaction rates: concentration, temperature, pressure, surface area, and catalysts.
• 😀 The presenter conducted two experiments to explore the effects of temperature and catalysts on reaction rates.
• 😀 Higher temperatures increase molecular movement, leading to more frequent collisions and faster reaction rates.
• 😀 In the first experiment, the presenter used tea bags and hot water to observe the effect of temperature on reaction speed.
• 😀 The second experiment focused on catalysts, using vinegar and bleach to observe their impact on corrosion rates.
• 😀 The presenter prepared three plastic cups for the catalyst experiment, demonstrating how different mixtures reacted.
• 😀 Observations showed that the mixture with vinegar and bleach reacted more quickly than the others.
• 😀 The experiment concluded that raising the temperature causes particles to move more actively, resulting in a greater likelihood of collisions.
• 😀 Catalysts, such as vinegar in this case, accelerate reactions without being consumed in the process.

Q & A

What is the definition of reaction rate mentioned in the transcript?

The reaction rate is defined as the change in concentration of the reactants over a specific period.

What are the five factors affecting reaction rate?

The five factors that affect reaction rate are concentration, temperature, pressure, surface area, and catalysts.

What two experiments did Najwa conduct during the practical session?

Najwa conducted two experiments: one focused on temperature and the other on the effect of a catalyst.

How does temperature affect the rate of reaction?

An increase in temperature causes molecules to move faster, which increases the likelihood of collisions and thereby accelerates the reaction rate.

What materials were used in the first experiment regarding temperature?

The materials used in the temperature experiment included tea bags, hot water, and regular water.

What is the role of a catalyst in a chemical reaction?

A catalyst is a substance that accelerates the rate of a reaction without undergoing any permanent change itself.

What materials were used in the second experiment involving catalysts?

The materials used in the second experiment included vinegar, bleach, and three plastic cups.

What was the conclusion regarding the effects of temperature on reaction rates?

The conclusion was that increasing temperature makes particles more active, leading to more frequent collisions and a faster reaction.

What was observed when comparing the reactions in the different cups in the second experiment?

It was observed that the cup with vinegar and bleach reacted faster than the others.

What does Najwa conclude about vinegar's role as a catalyst?

Najwa concludes that vinegar acts as a catalyst to speed up the corrosion process.