When an aluminum bar and an iron bar are inserted into the water to conduct electricity, are there any floating objects? Why?
6. aluminum with a hammer, prone to depression, iron is not easy 7. wire insulation sheath around the circle, much as possible (such as 100), multimeter to measure resistance, the slow response of the pointer is iron reaction of aluminum is fast.
1. different weight: iron density 7.8, aluminum is 2.7, more than two times the 2. magnet iron identification, will be attracted, not a test of 3. aluminum, iron hardness, hardness of aluminum, so the metal powder file when forced down into 4. different files in dilute hydrochloric acid, can put Ying the iron, a small change is 5. aluminum powder with charcoal calcined, first soft aluminum
It depends on what rods and electrodesWhen the iron rod is connected with the positive electrode of the power supply as an anode, the negative electrode connected with the power supply of the aluminum rod is used as the cathodeThe anode electrode is active metal, then the metal preferentially loses electronsThe iron reacts with electrons to produce ferrous ionsThe cathode is made of aluminum, so the metal does not get hydrogen ions in the electronsThe cathodic reaction of hydrogen ions leads to the formation of hydrogen and the alkaline enhancement of hydrogen cathodesTherefore, a large number of white floc near the cathode, immediately after the shock into gray green, exposure to air, long reddish brownWhen the aluminum rod is used as the anode of the power supply, the negative pole of the iron rod is connected with the cathode of the power supply as the cathodeBecause aluminum is a living metal, aluminum will lose electrons as an anodeThe anodic reaction leads to the loss of aluminum to trivalent aluminiumThe cathode react with hydrogen ions to change electrons into hydrogenIf water is to be produced by electrolysis of water, oxygen should be used as anode and the cathode material connected to the negative electrode of the power supply does not matter
