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When a small piece of potassium is dropped into a beaker of water the potassium moves about rapidly and then ignites within secounds the metal is gone and all activity ceases Is that chemical change?
Yes, according to wikipedia: Potassium reacts very violently with water producing potassium hydroxide (KOH) and hydrogen gas.2 K (s) + 2 H2O (l) → 2 KOH (aq) + H2 (g) This is a chemical change.
Is sodium reacting with water a physical change?
Freshly cut sodium has a metallic sheen. Within a few minutes, water in the air causes a layer of sodium hydroxide to develop on exposed surfaces. The reaction is strongly exothermic and the heat transferred to the local environment ignites the hydrogen that is produced. The hydrogen burns with a bright flame. In other words, sodium reacting with water is a chemical change and NOT a physical change. (combustion) Chemical changes such as combustion form new substances. 2 Na + 2 H2O > 2 NaOH + H2
What element is found in head of safety matches?
The match head contains sulpur and an oxidising agent and they have to be struck against a special surface to make the flame. The special surface contains sand, red phosphorus and a binder. When the match is struck, friction is gererated as a form of heat and the red phosphorus turns to a white phosphorus vapour which ignites spontaneously on contact with oxygen in air. The sulphur starts to burn and ignites the match stick
How is sulfur used in matchmaking?
Sulfur is commonly used in the production of matches to create the igniting tip on matchsticks. The presence of sulfur ensures that the match ignites when struck against a rough surface, triggering a chemical reaction that produces a flame.
Why do meteors have different colors such as red and blue?
It has to do with the chemical composition of the meteor and the speed in which the meteor is entering Earth's atmosphere. As the meteor plunges through the Earth's atmosphere, different temperatures will excite different chemicals within the meteorite all while the friction created from the meteor breaking though the atmosphere are stripping it of its' chemical layers. The temperature and the chemical composition that ignites will determine the color: sodium - orange/yellow iron - yellow magnesium - blue/green calcium - violet silicate - red
Is white phosphorous ignites easily a chemical or physical property?
chemical
Is white phosphorus ignites easily chemical or physical?
The ease of ignition of white phosphorus is a chemical property. This property relates to its reactivity and the energy changes that occur during the combustion process, which involves a chemical reaction with oxygen. Physical properties, on the other hand, pertain to the state or appearance of a substance without changing its chemical identity. Thus, the ignition of white phosphorus is fundamentally a chemical characteristic.
A match head ignites when struck Is this a chemical property?
Yes, the match head igniting when struck is a chemical property. It involves the chemical reaction between the match head and the striking surface that produces heat, leading to ignition.
Is White phosphorous ignites easily a physical change?
Yes, white phosphorus igniting is a physical change because it involves a change in the physical state of the substance (from solid to gas) without altering its chemical composition.
Is lighting a matchstick physical?
Yes, lighting a matchstick is a physical action that involves striking the match head against a rough surface to produce friction and heat, which ignites the match.
Is white phosphorous ignites easily a chemical property?
Yes, because a new compound (a new type of molecule, with another chemical composition) is obtained.
When a small piece of potassium metal is dropped into a breaker of water the potassium moves about rapidly and then ignites within seconds the metal is gone and all activity ceases this is and example?
It is an example of a chemical reaction
What happens when sodium is dropped in cold water?
it grabs electrons from hydrogen and forms H2 which ignites to explode'
Is a match ignites to form ash and mixture of gases a physical or chemical changes?
The process of a match igniting to form ash and a mixture of gases involves a chemical change. This is because there is a chemical reaction taking place when the match combusts, converting the matchstick's materials into new substances like ash and gases.
Striking a match chemical or physical?
Physical properties of the match would include thing such as its state, colour, odour, density and solubility. Chemical changes in the match would be such things at its ability to burn and the chemical changes of when the match is lit and there becomes a flame. Hope this helps a bit :)
Which is an example of a physical change A Gasoline ignites B Water evaporates C Wood rots D A nail rusts?
B Water evaporates is an example of a physical change. In this process, water changes from a liquid to a gas without altering its chemical composition. In contrast, gasoline igniting, wood rotting, and a nail rusting involve chemical reactions that change the substances' chemical structures.
Is it a chemical change when a safety match ignites and burns?
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.
