What can be added to water to make copper float?

Answer 1

Nothing that would keep it watery. Copper has 9 times the density of water.
http://en.wikipedia.org/wiki/Copper

You can simply reshape the copper to get it to float. Think how a steel ship can float.

Answer 2

Water is different from cyclohexane in that a water molecule has a relatively strong dipole moment which results in strong intermolecular forces, called hydrogen bonding of water molecules. This characteristic force is found greatly on the surface of water as the water molecules tend to line up flatly on the surface due to this dipole-dipole interaction and thereby contributes significant surface tension to hold up a strip of copper metal on its surface. Whereas, in comparison, cyclohexane is a straight chain aliphatic with no dipole moment, and therefore, cyclohexane has insignificant intermolecular forces in comparison with water, and so cyclohexane does not have a strong film of surface tension, so the copper strip sinks. The density of the copper metal is insignificant in this case.

Answer 3

add salt to dissolve in the water and increase the water density, so the water will be able to hold more weight. This is why you can float better in the Great Salt Lake or the Ocean.

Answer 4

If the copper is made into the shape of a boat, so that it is displacing its own weight ,it will float.

Answer 5

Anything more dense than copper.

Answer 6

i have heard that a lot of salt,haven't done it so i don't know for sure

Answer 7

ALOT of salt