Copper Chloride in Water + Aluminum foil Demonstration

Summary

The video captures a classroom experiment where copper chloride is mixed with water and aluminum foil. The instructor explains temperature changes, the chemical reaction between aluminum and copper chloride, and weighs the materials before and after the reaction. The temperature rises to 41.8°C, and the aluminum foil reacts visibly, changing color and losing mass. The instructor compares the current experiment with a previous one and discusses possible reasons for variations in results. The experiment highlights concepts like chemical reactions, heat transfer, and the importance of accurate data collection.

Takeaways

• 🌡️ The room temperature is 25°C and the water temperature starts at 24.2°C.
• ⚗️ The experiment involves copper chloride and aluminum foil being mixed with water.
• 📊 The speaker adds 64.7 grams of water, resulting in a solution weighing 67.3 grams.
• 🔄 There is a discussion about the state of water after adding copper chloride, questioning if it is still considered water.
• 🥶 Temperature readings show that the copper chloride solution rises to 41.8°C during the reaction.
• 📏 The aluminum foil weighs 1.2 grams, and it reacts in the solution, changing both the weight and the appearance.
• ⚖️ Post-reaction, the weight of the aluminum foil is reduced to 0.9 grams, showing a chemical change.
• 🔍 The experiment is designed to demonstrate the effect of dissolving metals and observing temperature changes during reactions.
• 🔴 After a day, the solution shows significant color differences, indicating chemical reactions with the foil.
• 🧪 An iron nail is introduced into the copper chloride solution, turning red as a result of the reaction.

Q & A

What is the initial room and water temperature at the start of the experiment?

The room temperature is 25 degrees Celsius, and the water temperature is 24.2 degrees Celsius.

What substance was added to the water, and how much water was used in the experiment?

Copper chloride was added to the water, and 64.7 grams of water was used in the experiment.

How much aluminum foil was used in the experiment, and how was its condition described?

1.2 grams of aluminum foil was used, and it was described as crumpled.

What was the maximum recorded temperature during the experiment, and how did the temperature change over time?

The maximum recorded temperature was 41.8 degrees Celsius. The temperature initially rose steadily before fluctuating slightly around 41.7 to 41.8 degrees Celsius.

How did the weight of the solution change after the experiment, and what might explain this change?

The solution's weight decreased from 1.2 grams to 0.9 grams. This change could be due to the reaction between the aluminum foil and the copper chloride solution, causing some of the foil to dissolve.

What observation was made about the solution's color after adding the aluminum foil?

The solution's color changed, with some parts becoming red, blackish, or brown, depending on whether they were fully submerged in the liquid.

Why was there a difference in liquid levels between two samples observed the next day?

The most reasonable explanation was that more water had been added to one sample compared to the other, as the liquid levels differed.

What reaction occurred when a common nail was added to the copper chloride solution?

The nail turned red, indicating a chemical reaction between the iron in the nail and the copper chloride solution.

How is the nail's transformation explained based on the elements involved?

The nail was made of iron (Fe), which reacted with the copper chloride solution. Copper (Cu) from the solution replaced the iron, causing the nail to turn red.

What types of substances could be explored in future experiments, based on the instructor's suggestions?

Future experiments could involve combining substances like sugar and water to explore whether dissolving substances changes their weight.