Praktikum Pergeseran Kesetimbangan Kimia

Summary

In this chemistry practical, the experiment focuses on demonstrating the concept of chemical equilibrium. Using colored food dyes in water at different temperatures and varying sugar concentrations, the experiment shows how liquid moves between two solutions. The results highlight how heat and concentration differences can shift equilibrium, with the colored water shifting based on sugar concentration. This practical demonstrates key chemical principles, such as the movement of molecules in response to concentration gradients and temperature changes, emphasizing the endotermic and exotermic properties of the substances involved.

Takeaways

• 😀 The experiment demonstrates a chemical equilibrium shift involving temperature and concentration changes.
• 😀 The materials used include food coloring (blue and red), cold and normal temperature water, a spoon, plastic, and two glass bottles.
• 😀 The initial setup involves mixing blue food coloring into cold water and red food coloring into normal temperature water.
• 😀 After stirring the colored water, one spoonful of sugar is added to each colored liquid (blue and red).
• 😀 The liquids are then transferred into separate funnels for easy pouring into the bottles.
• 😀 The bottles are stacked with the red-colored liquid bottle on top of the blue-colored liquid bottle.
• 😀 The reaction is observed by carefully removing the plastic from the bottles, noticing a shift in the colored liquid.
• 😀 The cold blue-colored liquid moves upwards, while the red-colored liquid (normal temperature) moves downwards.
• 😀 This reaction is explained by the endothermic nature of the cold liquid and the exothermic nature of the normal temperature liquid.
• 😀 A second experiment is conducted with different sugar concentrations: one spoonful of sugar in the red liquid and three spoonfuls in the blue liquid.
• 😀 The higher sugar concentration in the blue liquid causes it to move toward the lower concentration in the red liquid, indicating that the equilibrium shifts towards the area with lower concentration.
• 😀 The conclusion is that increasing the concentration of a substance will cause the reaction to shift toward the substance with lower concentration.

Q & A

What is the main topic of the video script?

The video script discusses a chemistry experiment about chemical equilibrium shifts, focusing on how temperature and concentration affect the movement of liquid in a controlled setup.

What materials are used in the experiment described in the video?

The materials include a red plastic spoon, blue food coloring, normal temperature water, cold water, two glass bottles, a measuring cup, sugar, and a funnel.

What is the first step in preparing for the experiment?

The first step is to prepare the materials, which involves adding blue food coloring to cold water and red food coloring to water at normal temperature.

What happens after the food coloring is added to the water?

After the food coloring is added to the water, the liquids are stirred using a red plastic spoon to mix the colors evenly in both the cold and normal temperature water.

How is the sugar added to the liquids in the experiment?

Sugar is added by placing one tablespoon of sugar into the red-colored water and one tablespoon into the blue-colored water, after which the liquids are stirred to ensure the sugar dissolves properly.

What is the purpose of using a funnel in this experiment?

The funnel is used to transfer the colored and sugar-mixed liquids into the glass bottles without spilling.

How are the two bottles positioned in the experiment?

The two bottles are stacked, with the red-colored bottle placed on top of the blue-colored bottle.

What is observed when the plastic covering is removed from the bottles?

Upon removing the plastic covering, the blue liquid from the cold bottle moves upward into the bottle with the red liquid, demonstrating the shift in equilibrium.

What conclusion can be drawn from the movement of the liquids in the experiment?

The conclusion is that the movement of the liquid is an example of an endothermic reaction, where the blue liquid moves to the warmer, red liquid. This shows how temperature affects the equilibrium of the system.

What happens when different amounts of sugar are added to the liquids?

When different amounts of sugar are added, such as 1 tablespoon in the red liquid and 3 tablespoons in the blue liquid, the blue liquid with the higher sugar concentration moves to the red liquid, demonstrating the principle of concentration affecting equilibrium.

What principle from chemistry does this experiment demonstrate?

This experiment demonstrates Le Chatelier's Principle, where a system at equilibrium will shift in response to changes in temperature or concentration in order to counteract the change.