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How do you know when a chemical change has taken place when a firework goes off?
Wiki User
∙ 11y ago
youwill hear it
Wiki User
∙ 11y ago
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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 is rusting mean?
A chemical change has taken place
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 corrosion of aluminium metal a physical change or a chemical change?
It is a chemical change. Through corrosion, a chemical reaction has taken place.
When liquid water evaporates which has taken place molecular change or chemical change?
Physical change.
What does not indcate that a chemical change may have taken place?
Fracture formation
2 colorless liquids produce a white precipitate when they are mixed together is it a chemical change or a physical change?
Chemical change. The formation of a precipitate is one indication that a chemical reaction has taken place.
What is making salt water to gargle for a sore throat a physical or chemical change?
Physical. It is a mixture of salt and water. No chemical change has taken place.
Why is adding drink powder to water is chemical change?
No. If you evaporate the water, the drink powder is left behind. No chemical change has taken place.
What evidence demonstrates that a chemical change has taken place?
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.
In examples of chemical changes the odor of sour milk indicates a chemical change has taken place true or false?
True
Is slicing turkey a physical or a chemical?
Slicing turkey represents a physical change, not a chemical change. The chemical composition of the sliced turkey is identical to the chemical composition of the intact turkey. Only a physical change has taken place.
