The experimental phenomenon of water electrolysis is that after applying electricity, oxygen is prod

The experimental phenomenon should be observable

What is directly observed during the electrolysis of water is the generation of colorless gas

But you don't know not which is O2 and which is H2

The moral phenomenon that can be observed should be:

The gas produced by the cathode is twice the gas produced by the anode. When the cathode gas is ignited, a sharp noise will be heard. heard, indicating that it is H2

Put a wooden stick with sparks near the anode, and the wooden stick lights up again indicating that it is O2< /p>

Why electrolyzed water cannot be; used instead of oil as a motor fuel

During the electrolysis of water, the gas obtained in the glass tube connected to the positive electrode of the power supply is oxygen . Oxygen can revive wooden sticks with sparks. the glass tube connected to the negative electrode of the power supplyue is hydrogen which can burn quietly in air and emit a blue flame which emits a lot of heat;

Pure water has very poor conductivity. To improve the conductivity of water, sodium hydroxide solution or dilute sulfuric acid can be added, as sodium hydroxide can ionize and move freely in water. Among sodium ions and hydroxide ions, sulfuric acid can ionize into freely moving hydrogen ions and sulfate ions in water. ;

The electrolysis of water generates hydrogen and oxygen, and the text expression is: water

So fill: revive the wooden sticks with sparkles; dilute the sulfuric acid; tr>ElectricityHydrogen + oxygen element hydrogen; element.

(1) According to the principle that water is electrolyzed into hydrogen and oxygen under direct current conditions in the laboratory, the gas can be released into the engine, ignite and the engine turns, then the gas is hydrogen gas. . Therefore, the expression for the reaction is: water

Direct current

Hydrogen + oxygen + oxygen

Ignition

Water. <; /p>

(2) According to the information provided in the question, the experiment is "the electrolysis of water to produce hydrogen or oxygen under the action of a voltage of 1800 V". It can be seen that this method currently requires a higher voltage, and it is difficult to achieve this goal in a car. This is also the main reason why this method does not have. been widely used until now

So the answer is: (1) This experiment.involves electrolyzing water to produce hydrogen or oxygen under the action of a voltage of 1800 V.

Then, the hydrogen-oxygen gas mixture is sent into the engine . , and it explodes after ignition, the engine starts to run.

The text expression is:

Water

Direct current

Hydrogen + oxygen

Hydrogen + oxygen < /p> p>

Turn on

Water

(2) Because this method requires higher voltage and it is difficult to achieve this in a car.