If lemon juice is rubbed onto a rusted penny, and the penny becomes shinier and reflects light better, is that a chemical change, or just a physical one?
2006-10-11 14:00:14 · 9 answers · asked by fashionistaqt 3 in Science & Mathematics ➔ Chemistry
Chemical change.
It is a chemical change the citric acid in the lemon juice is reacting with the rust or iron oxide on the penny to form new compounds.
Physical changes only alter the shape or placement of substances, the type of substances present does not actually change.
2006-10-11 14:12:34 · answer #1 · answered by Em_butterfly 5 · 0⤊ 0⤋
Chemical
2006-10-11 14:02:50 · answer #2 · answered by The Cheminator 5 · 0⤊ 0⤋
Chemical
2006-10-11 14:01:23 · answer #3 · answered by FLTL 1 · 0⤊ 0⤋
Yes. When the lemons acid bonds with the crud on the penny, the excess lemon acid takes away the salt that is formed when the crud and the lemon bond.
2006-10-11 14:08:44 · answer #4 · answered by thewordofgodisjesus 5 · 0⤊ 0⤋
A chemichal change is any time that the proporties of the item is changed( like if the rust on a pennt is taken off) and a phisical change is just when two things are put together but can be easily be put back to normal.
2006-10-11 14:03:01 · answer #5 · answered by Gilbert 2 · 0⤊ 0⤋
unless you see something like a precipitate or something else formed, i would say physical. the lemon juice probably isnt reacting with the penny, but the rust on it.
2006-10-11 14:03:29 · answer #6 · answered by cardsfan 2 · 0⤊ 0⤋
Hi. The lemon has an acidic juice and changes the copper oxide. Now guess.
2006-10-11 14:02:06 · answer #7 · answered by Cirric 7 · 0⤊ 0⤋
chemical
2006-10-11 14:24:51 · answer #8 · answered by Dr. J. 6 · 0⤊ 0⤋
your brain!~!
2006-10-11 14:18:44 · answer #9 · answered by pj f 1 · 0⤊ 0⤋