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Is potassium cloride dissolving in water a chemical change?
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).
Sodium and potassium reacts vioently with water is that a chemical or physical change?
chemical change
Is dropping a penny into a glass of water a physical change?
Yes
Do potassium iodide and water create chemical reaction?
No, only dissolving of KI but that is a physical change.
Chemical reaction for potassium nitride?
It reacts with water to produce toxic Ammonia
Is heating potassium bicarbonate a chemical or physical change?
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.
Does potassium bromine react in water?
Not with water! Maybe with something else in the water? It only ionises when dissolved in the water to: K+ and Br- , but does not react with it. Dissolving is purely physical!
Is it a physical change chemical change when salt dissolves in water?
Physical
Is dissolving a fizzy tablet like vitamin C in water a physical change?
No, dissolving a fizzy tablet like vitamin C in water is a physical change. The tablet is still vitamin C molecules, just dispersed in the water. Chemical bonds in the vitamin C molecules are not broken during the dissolving process.
Hydrochloric acid reacts with potassium hydroxide to produce a salt water and heat chemical or physical?
The reaction between hydrochloric acid and potassium hydroxide is a chemical reaction that forms water and potassium chloride salt. It is an exothermic reaction, meaning that heat is released as a result of the reaction.
When water is boiled is it a chemical or physical change?
Boiling is a physical phenomenon, a change of phase.
What is an example of a physical change happening?
putting water in to the refrigerator to freeze it cutting wood dropping plates, or cups chopping fruits or vegetables tearing paper breaking items chewing pencils peeling potatoes
