The main component of salt water is NaCl electrolyte, which contains a large amount of Na+ and Cl- ions. Under normal circumstances, these two ions should be able to move freely in the solution; but in toy cars There may be some kind of filtering device inside, making it easier for one of the ions to pass through the filter to the other side; or different metal plates are placed on both sides of the container holding the salt water, making it easier for Na+ ions to accumulate. At one end, Cl- ions are more likely to accumulate at the other end, and the effect is the same.
In this way, on both sides of the filter, or at both ends of the brine container, there will be a potential difference due to the imbalance of positive and negative ions. , is equivalent to connecting a battery. Driven by this battery, the micro DC motor inside the power car rotates to drive the wheels to run.
I don’t know if this is the case. Today, our Chinese teacher A small science and technology production assignment was assigned. I made a saltwater-powered car. Think about it, how can saltwater generate electricity? If you want to know, follow me!
In the afternoon, my mother bought me parts for a saltwater-powered car. After I got home, I started to make it excitedly. I first broke off all the parts with my hands and followed the steps in the instructions to make the saltwater-powered car step by step. Its shell is blue and its chassis is all white. It looks like a real racing car. It’s really cool! I thought: The time to witness a miracle is coming! I put two drops of salt water on the FC module of the car to see if it can run. As a result, it still stood there motionless. What is going on? I checked it carefully to see where the problem was. Oh, I finally discovered that the gears and bearings in the second step were not stuck together, and that the FC module was not inserted all the way. As soon as I corrected these things, the wheel started turning rapidly. I put it on the ground, and it ran to the wall with a "chirp", hit the wall, turned back, and turned to my feet. I shouted happily, "My experiment was successful, my experiment was successful."
According to the instructions, this is an environmentally friendly fuel - the concept of a salt water car. So far, no such car has been produced in the world, but I believe that there will be such a car in the future, because There is no difficulty in the world that cannot be overcome, and there is no enemy that cannot be defeated. Science turns out to be so amazing! I must study hard in the future, grow up to be a scientist, and explore the mysteries of the world.