chemical change.
2KClO3 ----> 2KCl + 3O2
Heating anything to a visible change is ALWAYS a chemical change
Potassium chlorate is a chemical compound with the formula KClO3. When heated, it undergoes decomposition to form potassium chloride (KCl) and oxygen (O2) gas. The decomposition reaction is commonly used in laboratory experiments and fireworks.
Heating potassium chloride crystals is a physical change because it only affects the physical state of the substance (solid to liquid) without changing its chemical composition.
Heating potassium bicarbonate is a chemical change because it causes a decomposition reaction. This results in the formation of new substances (potassium carbonate, water, and carbon dioxide) that have different chemical properties than the original compound.
No, the process of ice melting at 0 degrees Celsius is a physical change, not a chemical property. It involves a phase change from a solid to a liquid state without any change in the chemical composition of the ice.
Heating anything to a visible change is ALWAYS a chemical change
Potassium is not a change; potassium (K) is a chemical element.
Potassium chlorate is a chemical compound with the formula KClO3. When heated, it undergoes decomposition to form potassium chloride (KCl) and oxygen (O2) gas. The decomposition reaction is commonly used in laboratory experiments and fireworks.
chemical change
Heating potassium chloride crystals is a physical change because it only affects the physical state of the substance (solid to liquid) without changing its chemical composition.
This is a chemical change because a new compound, potassium nitrate, is formed through a chemical reaction between the potassium iodide and lead nitrate. Physical changes do not involve the formation of new substances.
Heating potassium bicarbonate is a chemical change because it causes a decomposition reaction. This results in the formation of new substances (potassium carbonate, water, and carbon dioxide) that have different chemical properties than the original compound.
Chemical
Antimony trisulfide and sulfur provide the fuel for the match, which is ignited by a combination of red phosphorus (on the matchbook) and potassium perchlorate (coating the match). When friction heats the red phosphorus, some becomes white phosphorus and reacts with the perchlorate. This is sufficient to ignite the trisulfide and sulfur.
Potassium metal does not dissolve in water, it is so reactive that it rips water molecules apart releasing hydrogen gas and combining with the remaining hydroxyl group to form potassium hydroxide (potash lye) which then dissolves in the water. This chemical reaction releases so much heat that it ignites the hydrogen gas that was emitted which produces water vapor/steam and a light purple flame (caused by excited potassium ions).
No, only dissolving of KI but that is a physical change.
It reacts with water to produce toxic Ammonia