Chemical Reaction of Bromine and Aluminum

The video demonstrates a chemical reaction where bromine is added to a test tube, followed by aluminum foil. The aluminum reacts with bromine to form aluminum bromide, creating a molten red-hot ball. When water is added, it reacts violently due to the presence of aluminum bromide, which is exothermic. The reaction is neutralized by adding more water, resulting in aluminum bromide powder.

What is the first step in the experiment?

• Adding aluminum foil to the test tube

• Adding bromine to a test tube

• Heating the test tube

• Adding water to the test tube

How is the bromine stored before use?

• In a glass jar

• In a plastic bottle

• In homemade ampoules

• In a metal container

What is added to the test tube after bromine?

• Sodium chloride

• Aluminum foil

• Sulfur

• Water

Why does the aluminum take a while to react with bromine?

• Due to the presence of water

• Because it is cold

• Due to the protective oxide layer on the aluminum

• Because it is in powder form

What can be seen when the reaction is slowed down?

• A blue flame

• A molten red hot ball of aluminum

• Bubbles forming

• A green gas

What is added to the test tube after the reaction is done?

• More aluminum

• More bromine

• Water

• Hydrochloric acid

What is the white powder formed at the end of the reaction?

• Aluminum oxide

• Sodium chloride

• Aluminum bromide

• Calcium carbonate