Method for identifying iron powder, aluminium powder and graphite powder
They can be used to determine the reaction with acid: the same quality, the same mass fraction of dilute hydrochloric acid solution, and then the three kinds of powder into three kinds of solution, graphite powder and hydrochloric acid reaction observed, iron and aluminum powder and hydrochloric acid hydrochloric acid reaction is slow, can react violently, prove that the nature of the most active aluminum iron, the main component of carbon graphite is the most stable chemical properties.
1. with a magnet and dilute hydrochloric acid!2. direct use of hydrochloric acid, aluminum powder, gas faster; iron powder moderate; graphite powder does not respond!
1. aluminum powder is silver, black substance attract rest with a magnet that attracted iron, not be attracted to the graphite2. Add equal mass, such as concentration of dilute hydrochloric acid, the gas is fast aluminum powder, slow iron, and do not produce gas is graphite.
