Can Ketchup Clean a Penny?

The video tutorial explores how to clean dull pennies using various household items. It begins with an introduction to the materials needed for the experiment, including dish soap, cola, vinegar, salt, lemon juice, and ketchup. Predictions are made about which substances will clean the pennies best. The experiment is conducted, and results show that acidic substances like vinegar and lemon juice clean the pennies effectively by dissolving copper oxide. The video concludes with an explanation of why acids work and encourages further experimentation with different substances.

What materials are needed to conduct the penny cleaning experiment?

• Dish soap, cola, vinegar, salt, lemon juice, ketchup

• Water, sugar, baking soda, lemon juice, ketchup

• Dish soap, cola, sugar, salt, lemon juice, ketchup

• Vinegar, cola, baking soda, salt, lemon juice, ketchup

Which solution made the penny the shiniest during the experiment?

• Soap and water

• Cola

• Vinegar and salt

• Ketchup

Why did the vinegar and salt solution clean the penny so effectively?

• It is a neutral solution that polishes the penny

• It is a mild detergent that cleans surfaces

• It is a strong acid that dissolves copper oxide

• It is a strong base that removes dirt

What is the role of acids in cleaning the pennies?

• Acids change the color of the penny

• Acids add a protective coating to the penny

• Acids dissolve the copper oxide layer

• Acids polish the surface of the penny

What is a suggested activity to further explore the cleaning of pennies?

• Use baking soda to clean the pennies

• Try cleaning pennies with oil

• Soak pennies in different kinds of juices

• Use sandpaper to polish the pennies