0
Plaster undergoes a chemical change when it is mixed with water to make a paste. During this process, a reaction occurs between the water and calcium sulfate hemihydrate in the plaster, forming a new compound called calcium sulfate dihydrate. This chemical reaction involves the rearrangement of atoms to form a different compound, thus demonstrating a chemical change.
Add your answer:
Earn +20 pts
Is water added to plaster of Paris reversible or irreversible?
Adding water to plaster of Paris is considered irreversible because a chemical reaction occurs when water is mixed with plaster of Paris, resulting in a new compound called calcium sulfate hemihydrate. Once the reaction is complete and the plaster has set, it cannot be reversed back to its original form.
What does the plaster feel warm when you poor it in to the sandcasting with plaster?
When you pour plaster into a sandcasting, the chemical reaction between the water in the plaster and the sand causes an exothermic reaction, which generates heat. This heat is trapped within the enclosed space of the mold, making the plaster feel warm to the touch as it sets and hardens.
Is condension a chemical or physical change?
actually it is a CHEMICAL change...because physical means you cant reverse the compounds like plaster of Paris mixed with vinegar turns hard but is an experiment that you cannot reverse back!! xxx
Why does salt make plaster set up faster?
Salt acts as a catalyst in the chemical reaction that causes plaster to set. The presence of salt speeds up the hydration process of the plaster, triggering quicker crystallization and hardening.
What are the adhesive used in plaster of Paris?
The adhesive used in plaster of Paris is water. When water is added to plaster of Paris powder, a chemical reaction occurs that causes the powder to transform into a thick paste that can then be applied to a surface before hardening.
What is the heat element in plaster?
There is no specific element in plaster that produces. The chemical reaction that results when plaster is mixed with water is what produces the heat.
What is the chemical name for plasters of Paris?
2CaSO4.H2O is known as Plaster of Paris.
Is water added to plaster of Paris reversible or irreversible?
Adding water to plaster of Paris is considered irreversible because a chemical reaction occurs when water is mixed with plaster of Paris, resulting in a new compound called calcium sulfate hemihydrate. Once the reaction is complete and the plaster has set, it cannot be reversed back to its original form.
What type of hazard is it when you find a plaster in a food item?
Its a chemical hazard
What happens when you mix plaster and vinager?
When you mix plaster and vinegar, a chemical reaction occurs that causes the plaster to dissolve and break down. This results in the formation of calcium acetate and water. The plaster will lose its hardness and structural integrity as it dissolves in the vinegar solution.
What does the plaster feel warm when you poor it in to the sandcasting with plaster?
When you pour plaster into a sandcasting, the chemical reaction between the water in the plaster and the sand causes an exothermic reaction, which generates heat. This heat is trapped within the enclosed space of the mold, making the plaster feel warm to the touch as it sets and hardens.
A thick coating of a paste of plaster of Paris pop is applied over the bandage on a fractured bone it becomes hard on drying to keep the fractured bone immobilised can the change in pop be reverse?
No, the hardening of plaster of Paris is a chemical reaction that cannot be reversed. Once the plaster of Paris hardens and sets, it cannot return to its original paste form. This property is what makes plaster of Paris ideal for immobilizing fractured bones.
Why does salt make plaster set up faster?
Salt acts as a catalyst in the chemical reaction that causes plaster to set. The presence of salt speeds up the hydration process of the plaster, triggering quicker crystallization and hardening.
Is condension a chemical or physical change?
actually it is a CHEMICAL change...because physical means you cant reverse the compounds like plaster of Paris mixed with vinegar turns hard but is an experiment that you cannot reverse back!! xxx
What is a adhesive plaster use for stopping blood?
AN adhesive plaster will soak blood up and stop it spreading around. Change them as often as possible.
Is burning a fire a physical or chemical change?
Burning is a chemical change.
Is the settling of plaster endothermic or exothermic?
The settling of plaster is an exothermic process, meaning it releases heat as it hardens. This heat is generated from the chemical reaction that occurs when the plaster mixes with water and begins to set.
