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There are many signs that can occur:
1) Production of a gas (some you can smell, others you can't)
2) Heating or cooling
3) A precipitate can form
4) A change in color or texture
5) A change in pH (acids/bases)
Remember, many reactions will not be directly observable. You can only observe them with the right equipment.
Wiki User
∙ 13y ago
Wiki User
∙ 11y ago1) the release of energy in the form of light and/or heat.
2) a color-change
3) the formation of a precipitate (solid substance appearing, usually after mixing 2 aqueous solutions together).
Wiki User
∙ 11y agochange in temperature
formation of a precipitate
disappearance of a solid
formation of a gas
color change
formation of a new odor
Wiki User
∙ 10y agoA new substance is produced. Heat, energy or a gas may be released. There may be a change in color.
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When a flower goes brown is it a chemical or physical change?
The browning of a flower is a chemical change. Color changes are one sign of a chemical reaction.
Is baking soda mixed iodine solution a chemical change?
Chemical, When something changes in color, it is a sign of a chemical change.
A change in color when two solutions are mixed together is a clue that what has taken place?
A change in the color of a solution is a sign thatthere is a chemical change happening. A chemical change happens when two substances combine forming another substance. It can also happen when two or more substances decompose.
What does fizzing mean in a chemical reaction?
It is a sign that a chemical change is taking place, rather than a physical change.
What is the sign of a chemical change?
There are actually many different signs of chemical change. Of all in which one could be a numerous number of color change, smell, fizzing, boiling temperatures, and others.
Is changing of color a sign of chemical change?
The change of color may be a sign of a chemical reaction.
What is one sign of a chemical change?
Change of color
Is production of gas a potential sign of chemical change?
The release of a gas can be a sign for a chemical reaction.
Is copper and silver a chemical or physical change?
It is a chemical change because it leaves a residue (which is a sign of chemical change) Hope that helps
How is rotting a chemical change?
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
When is a phase change and when is it a sign of a chemical change?
After a physical change the molecule remain intact.After a chemical change the molecule is modified.
Why is paper burning a chemical reaction?
Burning is a sign of a chemical change
How chemical change that garbage undergoes?
garbage rotting is a chemical change because the odour becomes different which is considered a sign of chemical change.
When a flower goes brown is it a chemical or physical change?
The browning of a flower is a chemical change. Color changes are one sign of a chemical reaction.
Is baking soda mixed iodine solution a chemical change?
Chemical, When something changes in color, it is a sign of a chemical change.
Is baking a physical or chemical change?
pretty sure its a chemical change.
What is a sign of a chemical change but isn't reliable?
smell
