Quick Answer: What Juice Cleans Pennies Best Science Fair Projects?

What cleans a penny better science fair project?

Create a solution of vinegar and salt using one teaspoon of salt and 1/4 of a cup of vinegar. Mix until the salt is dissolved (it helps if the vinegar is a little warm). Add the pennies. Wait about 5 minutes, then remove the pennies from the solution.

Which chemical cleans pennies the best science project?

Vinegar and lemon juice both work really well for cleaning pennies.

What liquid is used to clean pennies?

Copper oxide dissolves in a mixture of weak acid and table salt-and vinegar is an acid. You could also clean your pennies with salt and lemon juice or orange juice, because those juices are acids, too.

Does lemon juice clean pennies better than vinegar?

Ultimately, lemon juice will clean pennies better than vinegar, though both liquids are viable cleaning options for copper. This means that lemon juice is a slightly stronger acid than vinegar. The stronger the acid, the better it will clean copper pennies.

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What solution cleans coins the best?

Follow These Steps:

  • In a jar, combine one cup vinegar (or lemon juice) and 1 tablespoon salt.
  • Pour the solution into the plastic container.
  • Add the coins in a single layer, so none of the coins are touching.
  • When you remove the coins and wipe them with a cloth or paper towel, they should look shiny.

How do you clean dirty coins fast?

Take the coins out and sprinkle some baking soda over them; then use a soft-bristled toothbrush to brush them clean. Rinse them out thoroughly with hot water; using tongs or gloves to hold them to avoid burning your fingers. Place them on a soft, cotton towel and leave to air dry.

What are good science fair projects?

40 Clever Seventh Grade Science Fair Projects and Classroom Experiments

  • Crush a can using air pressure.
  • Construct a geodesic dome.
  • Design a solar oven.
  • Spherify your favorite beverage.
  • Design a helping hand.
  • Watch the greenhouse effect in action.
  • Marvel at a density rainbow.
  • Discover computer coding with LEGO bricks.

Can vinegar make a penny shiny?

Copper oxides are really dark, and so they make the penny less shiny! The acetic acid in vinegar breaks down these copper oxides! This effectively removes the dark molecules leaving a shiny penny behind.

Will lemon juice or Coke clean a penny better?

Coke and off-brand colas will quickly remove the tarnish. Just don’t drink the coke afterward. Coke contains phosphoric acid that cleans the oxides. Try a variety of citrus juices to see which works best or simply let your pennies soak in lemon juice.

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How do you clean pennies with toothpaste?

Toothpaste. Smear a small amount of toothpaste onto a dirty penny. Wet a toothbrush and begin scrubbing the penny. While still scrubbing with the toothbrush, rinse the penny with room temperature water.

Why do pennies turn green?

A penny is made of copper. The vinegar on the paper towel helps the copper in the penny easily react with the oxygen in the air to form a blue-green colored compound called malachite.

Why do pennies turn dull?

When oxygen binds with copper, they form a new molecule known as copper oxide. This is why most pennies you see look dirty or tarnished—it’s not actually dirt but copper oxide that makes them look so dull.

Why does lemon juice make pennies shiny?

THE SCIENCE BEHIND IT Vinegar and lemon juice are acidic and will remove the copper oxide, leaving the pennies shiny.

How does lemon juice make pennies shiny?

Put a dirty penny in the cup and cover it with lemon juice. Wait about five minutes then remove the penny and wipe it off with a paper towel. Try the taco sauce to see which works better.

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