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Some 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
∙ 7y ago
Wiki User
∙ 7y agoYou can tell if a chemical change has occurred, if there is a color change, bubbling, "explosions" or smoking.
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Pretend you've done a science experiment showing the results of a chemical reaction what video clips would be best to add to your report?
A video showing the reaction as it occurred
What chemical reaction occurred copper sulfate pentahydrate when heated?
The chemical decomposition is:CuSO4------ CuO + SO3
Is a rusty penny an example of a chemical reaction true or false?
Yes. The rust on the penny indicates that a reaction between the penny and its environment has occurred. Since a new material was formed from this reaction (the rust) the reaction must be a chemical reaction.
What evidence is there that a chemical reaction has occurred in an automobile?
Yes there is a chemial reaction,when gas is compressed by piston temperature increases so it cathes the fire.
How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
For a chemical change to occur, there must be a chemical reaction. A chemical reaction would be either endothermic (uses energy, mostly heat), or exothermic (produces energy, again mostly heat). Any change in temperature of the reactants, as measured by a thermometer, will tell you not only ifa chemical reaction occurred, but also which kind of chemical reaction. No temperature change usually indicates that no reaction has occurred, a decrease in temperature would indicate an endothermic reaction, while an increase in temperature would indicate an exothermic reaction.
How we know a chemical change has occurred when burning a candle?
Burning is a chemical reaction, an oxydation.
How does a chemical equation show that a chemical reaction has occurred?
A chemical equation shows that chemical reaction has occurred as new substances have been formed from the reagents. A chemical equation has two sides before reaction and after reaction, if there is any change from the before reaction side to the after reaction side, it indicates that a chemical reaction has just occurred.
What is present after a chemical reaction?
That depends on the chemicals present before the chemical reaction and sometimes the conditions under which the chemical reaction occurred.
If the chemical properties of the substance have not changed has a chemical reaction occurred?
It depends: just try to relate, try to write a chemical equation for and see if there are byproducts. Most likely, if the same chemical still has its same properties After the reaction, a chemical reaction has not occurred.
A chemical reaction has not occurred if the products have?
The same chemical properties as the reactants.
How does the chemical equation show that a chemical reaction occurred?
When a compound produces.
Is a soluble aspirin fizzing in water a chemical reaction?
Yes. If there is the appearance of a gas (fizzing), then a chemical reaction has occurred.
When a substance is broken down or combined formingnew substance a has occurred?
A chemical reaction has occurred.
Pretend you've done a science experiment showing the results of a chemical reaction what video clips would be best to add to your report?
A video showing the reaction as it occurred
What chemical reaction occurred copper sulfate pentahydrate when heated?
The chemical decomposition is:CuSO4------ CuO + SO3
When substances are formed that are different from the starting substances has physical change occurred?
A chemical reaction is a chemical change.
The amount of energy available to do work after a chemical reaction has occurred is called?
Chemical energy
