Chemical change would cause change in physical quality or thermal value, the most observable quality is colour. It may observed a colour change of reaction but not all reaction had observable change of colour. In that case it will need to add indicator to observe a chemical change. Type of indicator may be different base on the concerned reaction. Indicator chosen may be the type that change colour due to pH or the type that react with contents of product to change colour.
Signs of chemical reactions may be: - Gas was formed - Formation of a precipitate and water - Reactants disappeared - products were made - energy is released - properties of reactant and products are different
It is a physical change. :D
chemical change
chemical change :-)
It is a Physical Change because i dont know but im sure that is a physical change :P
pretty sure its a chemical change.
The only way to be sure a chemical reaction or change has occurred is to test the composition of a sample before and after a change.
Signs of chemical reactions may be: - Gas was formed - Formation of a precipitate and water - Reactants disappeared - products were made - energy is released - properties of reactant and products are different
Sure. A steel frame that begins to rust will be undergoing a chemical change.
i m pretty sure a colour change represents a Chemical change
It is a physical change. :D
I'm not sure. I think it is a chemical change.
chemical change
For a chemical change they analyze the new substances to prove there has been a change in the chemical composition. I am not sure about physical though.
chemical change :-)
I depends what is coagulating -- for blood it is certainly chemical. There may be physical coagulation processes, although I'm not sure.
i am pretty sure it is a physical property! :)