Why does vinegar clean a penny the best?
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.
Transcript of What liquid cleans pennies the best? If I use Ketchup, Coke, Lemon Juice, and vinegar to clean a penny. I think the coke will clean the penny the best after 2 hours. Lemon Juice is very acidic because it has the highest concentration of citric acid out of all the fruits.
- For many pennies, one tablespoon (15 g) of salt in 1/2 cup (4 oz) of vinegar will get the job done. Stir the mixture to dissolve the salt. If you don't have vinegar, use lemon or even orange juice. Copper oxide (the gunk on your pennies) dissolves in weak acid, and that's just what all three of these liquids are.
- Pour the vinegar into the bowl and add the salt – stir it up. Put about 5 pennies into the bowl and count to 10 slowly. Take out the pennies and rinse them out in some water. Admire their shininess!
Some juices will have almost no effect on pennies, while others will clean off the copper oxide completely, revealing a shiny penny that looks just like new. More basic juices include grape juice and apple juice. At the acidic end are tomato juice, grapefruit juice, orange juice, lime juice and lemon juice.
- Simply submerge the item in a bowl of ketchup and let it sit for 5 to 10 minutes. (Don't leave it in too long, or the acid from the tomatoes and vinegar could cause damage.) Then remove the jewelry and use an old toothbrush to gently scrub the paste around before rinsing it off with warm water.
- HOW TO CLEAN BRASS WITH TOOTHPASTE. Small brass objects can be cleaned with a little toothpaste (not the gel type). Apply it with a soft, damp cloth or toothbrush, then rinse and dry.
- Vinegar, Salt and Flour: These versatile home staples can be combined to make a paste to clean tarnished brass. Dissolve 1 teaspoon of salt into one-half cup of vinegar, and add flour until the mixture becomes a paste. Rub into the brass, leave for about 10 minutes, then rinse with warm water and buff dry.
The use of vinegar and salt to clean pennies goes way back. It works on the same principle as using ketchup (Ketchup contains vinegar, salt and tomatoes), but there is less rubbing involved. Mix up a concoction of vinegar and salt. Stir it around to dissolve the salt and then dump in your dirty pennies.
- Pour some vinegar over the coin. Wait about ten minutes, then rub the vinegar off with a toothbrush. This may give the coin a more polished finish. Consider using anything acidic: lemon juice, apple cider vinegar, and even sodas have been said to help clean rust off of old coins.
- Actually, none of the coins will "rust", because rust is iron oxide, the corrosion product of iron and steel, and none of your coins are iron or steel. Hopefully some of the coins will start to corrode though; I'm betting on the pennies. Good luck! So the coins are not going to "rust".
- Nothing will make a penny rust because rust is "iron oxide", so only things with iron in them can "rust", whereas a penny is made of copper plated onto a zinc core. But anything acidic or salty will cause the pennies to corrode.
Updated: 2nd October 2019