Leave the rocks submerged in a jar for about 90 minutes. Then use a spoon to carfully scoop the rocks from the jar labeled 0%acid. Dry the rocks by patting , or blotting them with a soft rag.

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

Not a  mixture of two common elements that can be separated by physical means.