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What evidence demonstrates that a chemical change has taken place?
Wiki User
∙ 7y ago
You might observe a change in color, gas bubbles being formed, a change in temperature (this might require the use of a thermometer, unless the solution actually boils), or you can test for a specific chemical by using an indicator, or analyse the solution by means of a mass spectrometer. Explosions are also a very convincing form of evidence that a chemical change has taken place.
Wiki User
∙ 14y ago
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What evidence is there to show that a chemical reaction has taken place when an egg is cooked?
The change in color indicates that a chemical reaction has taken place.
Is fizzing a chemical change?
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
If a piece of metal bubbles was place in acid is that a chemical change?
No, it is not a chemical change. For example, if you put gold bubbles into any single acid, no chemical change will take place.
Is corrosion of aluminium metal a physical change or a chemical change?
It is a chemical change. Through corrosion, a chemical reaction has taken place.
What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
What evidence is there to show that a chemical reaction has taken place when an egg is cooked?
The change in color indicates that a chemical reaction has taken place.
Is fizzing a chemical change?
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
Is combustion a chemcial change?
Combustion clearly is a chemical change. In the combustion of a hydrocarbon, for example, you begin with the hydrocarbon and after combustion you end up with carbon dioxide (CO2) and water (H2O). This demonstrates that a chemical change has taken place.
How can you be sure that at least one chemical change has occurred?
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
What form of evidence do you need to show that a chemical reaction has taken place?
You must video tape it and make sure the final result is either a physical change or a chemical change.
What changes gives NO evidence that a chemical reaction has taken place?
Physical changes give no evidence that a chemical reaction has taken place, because no chemical reaction has taken place.
What evidence indicates that a chemical change took place when the iron and sulfur combined to form iron sulfide?
The change resulted in a new property.
What evidence do you have that a chemical reaction took place?
changes in its appearance ie colour and state
What kind of change is taking place if white mold growing on a strawberry?
A chemical change is taking place.
If a piece of metal bubbles was place in acid is that a chemical change?
No, it is not a chemical change. For example, if you put gold bubbles into any single acid, no chemical change will take place.
Is corrosion of aluminium metal a physical change or a chemical change?
It is a chemical change. Through corrosion, a chemical reaction has taken place.
What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
