Chemistry

The preparation of ammonia gas involves reacting ammonium chloride (NH₄Cl) with sodium hydroxide (NaOH) in a process called ammonium chloride and sodium hydroxide solution in a two-necked flask. The resulting reaction produces ammonia gas, which can be collected by upward displacement of air or through other appropriate methods.

The rate of a chemical reaction refers to the speed at which reactants transform into products, typically measured in terms of how quickly a specific quantity of reactant disappears or product forms. Factors such as temperature, concentration, and the presence of catalysts can influence and control the rate of a chemical reaction.

In a phenolphthalein and ammonia diffusion experiment using cotton, a solution containing phenolphthalein, a pH indicator, and ammonia is placed on a piece of cotton. As ammonia diffuses through the cotton fibers, it causes the phenolphthalein to turn from colorless to pink or purple, demonstrating the movement of the alkaline substance through the fabric. This […]

The Na2CO3 and sugar volcano experiment simulates a volcanic eruption by mixing sodium carbonate (Na2CO3) with sugar. When heated, the sugar decomposes, producing carbon dioxide gas, while the Na2CO3 acts as a catalyst, enhancing the reaction, creating a frothy “lava” that erupts, providing an engaging demonstration in chemistry and geology lessons.

In this amazing chemistry experiment, we mix iodine crystals with strong ammonia to make a substance called nitrogen triiodide (NI3). We separate this substance by filtering it. When it dries, it’s super unstable. Even a tiny touch makes it explode into nitrogen gas and purple iodine vapor, making a big, noisy “snap” sound. 이 놀라운 […]