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Well, there are four clues to a chemical change. The first clue is a transfer of energy. For example, energy is transferred from methane in natural gas to cook food. The second clue is a change in color. Food browning while being cooked is an example of this. The third clue is the production of a gas. Some cleaning chemicals create bubbles upon contact with soap scum. This is evidence of a chemical change. The last clue is the formation of a precipitate. The ring of soap scum in a bathtub is a precipitate, and evidence of a chemical change.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoSome indicators of a chemical reaction are:
- change of color
- change of odor
- release of a gas
- change of the temperature
- change of the viscosity
- formation of a precipitate
- change of general appearance
- possible explosion
- possible chemiluminescence -formation of new compounds
Wiki User
∙ 14y agotwo are rusting and change in color.
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more: the release of a gas, precipitation, generation of heat (exothermic reaction)
Wiki User
∙ 15y agoChemical changes are indicated by:
* color change * energy given off (heat, light) * gas given off (bubbles) * precipitate forms
Wiki User
∙ 6y agoThere are several.> Change in color
>Appearance of bubbles
>Change in temperature
>Appearance of a precipitate
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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 are two possible indications that a chemical change has taken place?
Color ChangesAs in the case of autumn leaves, a change in color is a clue to indicate a chemical change.Perhaps you have found a half eaten apple that turns brown. The reason is that a chemical change has occurs when food spoils.Odor ChangesIt only takes one experience with a rotten egg to learn that they smell different that fresh eggs. When eggs and food spoil, they undergo a chemical change. The change in odor is a clue to the chemical change.Production of Gases or SolidsThe formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change.Another clue that a chemical change has occurred is the formation of a solid. A solid that separates out of solution during a chemical change is called a precipitate.Energy - Absorbed or ReleasedAnother sign of a chemical change is the release or gain of energy by an object.Many substances absorb energy to undergo a chemical change. Energy is absorbed during chemical changes involved in cooking, like baking a cake.
Is the flammability of ether a physical or chemical change?
i have no clue you tell me and stop useing internet use your mind see im so bad at speling im in 12th grade usee your own mind.
What must you know if a chemical change occurs?
fizzingcolor change (of course, this exempts artificial coloring)odorformation of precipitateproduction of gasformation of new substance (elemental bonding)
What is the temperature of fire cracker?
i wouldn't have much of a clue but i think it's gunpowder that is put in fireworks (or whatever it is (find that out) Then look up the temperature at which whatever chemical it is burns at.
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 are two possible indications that a chemical change has taken place?
Color ChangesAs in the case of autumn leaves, a change in color is a clue to indicate a chemical change.Perhaps you have found a half eaten apple that turns brown. The reason is that a chemical change has occurs when food spoils.Odor ChangesIt only takes one experience with a rotten egg to learn that they smell different that fresh eggs. When eggs and food spoil, they undergo a chemical change. The change in odor is a clue to the chemical change.Production of Gases or SolidsThe formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change.Another clue that a chemical change has occurred is the formation of a solid. A solid that separates out of solution during a chemical change is called a precipitate.Energy - Absorbed or ReleasedAnother sign of a chemical change is the release or gain of energy by an object.Many substances absorb energy to undergo a chemical change. Energy is absorbed during chemical changes involved in cooking, like baking a cake.
An Attempt to explain observation that has already taken place?
I have no clue
Is change in color a clue that can indicate a chemical change?
Yes. Research litmus paper.
What are the five clues that suggests a chemical reaction is taking place?
first when there's a physical change in the substance second there will be a solution or a formula to that substance third is, it involves temperature fourth is change in color of the substance fifth is the bubbling of another substance is yet an another clue that a chemical reaction has occured.
What inventions were taken place at the same time of the industrial revolution?
dnt hav a clue sum1 plz help
What chemical equation?
i have no clue
Is a change in shape a clue that indicate a chemical change?
It is a physical change unless it is caught on fire to mold into a different shape then it would be a chemical change. The substance that does change shape does not develop new chemical properties.
Is play dough a chemical or physical change?
chemical
Is wax melting a chemical or physical or chemical property?
Physical change. The wax was solid and now it is a liquid. All phase changes are physical changes.
What are some signs that indicates a double displacement reaction has taken place?
1) Formation of a precipitate 2) Usually there is a colour change. 3)Neutralization reactions (also a double displ. reaction) involving an acid and a base form water which is a clue.
Is food spoiling a chemical change?
Yes, it is a chemical change. It only takes one experience with a rotten egg to learn that they smell different that fresh eggs. When eggs and food spoil, they undergo a chemical change. The change in odor is a clue to the chemical change Chemical Reactions Chemical Changes are also called Chemical Reactions. Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.
