0
Not necessarily. Things sometimes change colors during a chemical reaction, but a color change is not sufficient evidence of a chemical reaction. You can add drink mix to water and the water turns colors, but it is not a chemical reaction, just a mixture.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
What two things happen in a chemical reaction?
change in properties and changes in energy
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Why is the changes of color when mixed with water a physical property?
The change of color is due to a chemical reaction with water or to formation of a hydrate.
How is color a sign of chemical change in food?
When a new color is formed. This is not to be mistaken for a mixture of each of the chemicals that were combined. For example, if a blue substance is combined with a clear substance, and the result is orange, it is a chemical change. However, if the result is just a lighter blue, it does not necessarily indicate chemical change.
What does physical and chemical change have in common?
A physical change to an object is a change in properties not involving the chemical makeup. In other words, a physical change is any change you can make to an object without changing the actual substance. (I.e. state of matter, size, shape, color . . .etc.) A chemical change is a change that forms a new substance through a chemical reaction. A chemical reaction is often signaled by bubbling or fizzing, but the only real way to prove a chemical reaction is by coming up with a new substance. So physical changes leave you with the same substance (slightly altered in appearance/texture etc.), but chemical reactions give you a new substance.
What is the definition chemical change?
Chemical ChangesAs opposed to a physical change, chemical changes are present when the substance undergoes a chemical reaction and produces a new substance. A chemical change is a chemical reaction that will always take place for there to be a chemical change. Signs that a reaction is taking place: Formation of gases (bubbles), Color change, production of heat or light, and the formation of a solid. a change in composition and characteristics of matter.new substance maybe formed.original substance and form may be lost.new color and shapeExamplesFermentationPhotosynthesisRusting nailSpoiling milkDigesting food
Why is a indicator's reaction in acids and bases a chemical change?
Indicates whether the substance is an acid or alkali.
If the color changes it is a chemical or physical?
- Color is a physical property and the change of color also.- Color change may be a sign of a chemical reaction.
What happens to a substance during a chemical change or chemical reaction?
substances can change to a solid, gas or liquid. solid - precipitate gas - fumes liquid - color change Either way, since its a chemical reaction, there always will be a change in the chemical composistion of a substance.
Is cornstarch mixed with vinegar a chemical reaction?
it changes the color of cornstarch *improvement* No, its a physical reaction.
When a metal changes color because it has reacted with another substance and what change occured?
Chemical
What chemical and physical changes?
Chemical changes change to a substance`s chemical formula but a Physical change only affects attributes like color shape or size
What two things happen in a chemical reaction?
change in properties and changes in energy
Is sorting rocks by color a chemical change?
Of course not. It is a physical change. A chemical change occurs when the identity of a substance changes.
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Why is the changes of color when mixed with water a physical property?
The change of color is due to a chemical reaction with water or to formation of a hydrate.
How is color a sign of chemical change in food?
When a new color is formed. This is not to be mistaken for a mixture of each of the chemicals that were combined. For example, if a blue substance is combined with a clear substance, and the result is orange, it is a chemical change. However, if the result is just a lighter blue, it does not necessarily indicate chemical change.
