### Polishing Coins

Materials:
• Dishwashing cleanser
• Distilled white vinegar
• Lemon juice

• Cola
• Distilled water
• 5 rusted copper pennies
• 5 little plastic mugs or compartments

• 1 expendable plastic spoon
• A measuring spoon that measures teaspoons
• A measuring container (measures mugs)
• A vast glass
System
• Pour some water into the measuring container and empty it into the tall glass.
• Measure ¼ teaspoon of cleanser with the measuring spoon and empty the fluid into the tall glass, as well.
• Stir the water and cleanser in the glass with the plastic spoon.
• Place a penny in each of five little plastic glasses.
• Pour enough lemon juice, vinegar, cleanser arrangement, water, and cola to totally submerge a penny into particular glasses. Every glass ought to have a penny and an alternate fluid in it.
• Let the pennies sit in the fluids for five minutes. What changes in the containers do you take note?
• After the five minutes, expel every penny from the glasses with the plastic spoon, putting every coin on the work surface. Clean the spoon after every expulsion.
• Dry the pennies with a paper towel and note any removable substances.
• Pour the vinegar, lemon juice, water, cola, and cleanser down a sink deplete.
Logical Explanation
The pennies are produced using copper, which responds with the air to frame a thin oxide covering. This is on the grounds that copper iotas are sure, and the oxygen particles noticeable all around have negative properties. Like magnets, the positive and negative charges pull in each other to frame new mixes. The acids in the cola, lemon juice, and vinegar expel the oxides, yet the cleanser and water don't respond with the penny surfaces. This clarifies the event of the substance that was expelled from the penny in the vinegar with the paper towel.