Zinc Plating Experiment Steps

The video tutorial demonstrates a chemistry experiment where a copper penny is plated with zinc and then heated to form a brass coating. The process involves mixing zinc dust with sodium hydroxide, heating the mixture, and immersing the penny. After plating, the penny is heated in a Bunsen burner flame to create a brass alloy on its surface.

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

• Silver coin, aluminum dust, and 6 molar NaOH

• Gold nugget, iron filings, and 3 molar NaOH

• Copper penny, zinc dust, and 6 molar NaOH

• Copper wire, zinc powder, and 3 molar HCl

What is the first step after gathering the materials for the experiment?

• Mixing zinc dust with water

• Adding zinc dust to the NaOH solution

• Heating the copper penny directly

• Placing the penny in water

How long is the zinc dust and NaOH mixture heated before adding the penny?

• Two minutes

• Five minutes

• Ten minutes

• Fifteen minutes

What happens to the copper penny when it is placed in the heated zinc and NaOH mixture?

• It dissolves completely

• It becomes coated with zinc

• It remains unchanged

• It changes color to green

What is the purpose of placing the penny in cold water after removing it from the mixture?

• To dissolve the zinc coating

• To cool it down and observe the zinc plating

• To change its color

• To remove impurities

What is observed on the penny after it is removed from the zinc and NaOH mixture?

• No visible change

• A gold sheen

• A zinc plating

• A silver coating

What is the next step after observing the zinc plating on the penny?

• Coating the penny with another metal

• Placing the penny back in the NaOH solution

• Cooling the penny in ice

• Heating the penny in a Bunsen burner flame

What is the result of heating the zinc-plated penny in a Bunsen burner flame?

• The penny melts completely

• The penny remains unchanged

• The penny becomes coated with brass

• The penny turns black

What is the chemical process that occurs when the zinc and copper mix on the penny?

• Alloy formation

• Reduction

• Oxidation

• Sublimation

What is the final appearance of the penny after the entire experiment?

• It has a brass coating

• It looks like a regular copper penny

• It is completely dissolved

• It is covered in rust