Sodium reacts with water to formsodium hydroxide, which releases hydrogen gas and is chemically active.
Sodium has very active chemical properties. It combines with oxygen at room temperature and when heated, reacts violently with water and explodes in large quantities. The ionic equation for the reaction between sodium and water is: 2Na+2H2O═2Na++2OH?+H2↑.
Chemical reaction phenomenon between sodium and water
1. Once sodium metal is placed in water, the sodium floats on the water.
2. Sodium swims quickly to the surface of the water and makes a slight hissing sound.
3. The sodium melts into a shiny ball.
4. After the reaction, phenolphthalein is poured into the solution and the solution turns red.
5. The gas generated may ignite and emit a popping noise.
As the picture shows, there are 100 ml of distilled water in a bdry, and a small ball with a smooth surface, resistant to heat and alkali is suspended in the water (the ball is stable in the center of the water)< /h3>
The essence of an ionic reaction is one in which ions participate in the reaction or ions are generated. Because only in this way can the ionic reaction equation explain the essence of the entire reaction process. The reaction between sodium and water is an ionic reaction because ions are produced. Do not separate the water when writing it.
In the process of softening water-based products, what is the working principle of the sodium ion floating bed?
| (1) Sodium reacts violently with water, gives off a lot of heat and is prone to explosions (2)C (3) The ball goes up; sodium reacts with water to form NaOH, the density of the liquid increases and the pushing force on the ball increases (4)2Na+2H 2 O= 2Na + +2OH - + H 2 ↑ |
Sodium reacts with ions when put in the water. For what?
The exchanger is equipped with a certain height of sodium ion exchange resin as an exchange agent. When raw water enters the exchanger layer of the exchanger from bottom to top, the sodium ions on the exchanger replace the calcium. and magnesium ions in raw water. The water is softened. Reaction formula: Ca2+ +2NaR →CaR2 + 2Na+ Mg2+ +2NaR →MgR2 + 2Na+
Because water can ionize H+. After adding Na, the ionization of water is promoted thanks to the reaction of Na and H+.
Chemical equation: 2Na+2H2O==2NaOH+H2↑
Ionic equation: 2Na+ + 2H2O == 2Na+ + 2OH- + H2↑