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What are the four occurrences indicate a chemical reaction has occurred?
Wiki User
∙ 11y ago
A chemical reaction can result in any or all of the following:
- a change in temperature (up or down)
- a change in color
- a smell that wasn't there before
- the formation of bubbles (indicating the production of a gas)
- the formation of a precipitate
Wiki User
∙ 11y ago
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How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
A thermometer can help you determine if there was a chemical change by measuring any temperature change that occurs during the reaction of iron and charcoal. If there is a noticeable increase or decrease in temperature, it could indicate a chemical reaction took place, as chemical reactions often involve the release or absorption of heat energy.
What evidence do you have that a chemical reaction took place?
Evidence of a chemical reaction includes the formation of a new substance with different properties, changes in color, the release of gas or heat, or the formation of a precipitate. Additionally, changes in mass due to the rearrangement of atoms in the reactants can also indicate a chemical reaction has occurred.
What chemical reaction occurred copper sulfate pentahydrate when heated?
The chemical decomposition is:CuSO4------ CuO + SO3
What evidence is there that a chemical reaction has occurred in an automobile?
Some signs of a chemical reaction occurring in an automobile could include smoke or unusual smells coming from the engine, changes in the color of liquids like oil or coolant, or the presence of corrosion or rust on metal parts. Additionally, a drop in performance or unusual noises could also indicate a chemical reaction, such as combustion in the engine.
If the chemical properties of a substance have not changed has a chemical reaction occurred?
No, a chemical reaction has not occurred if the chemical properties of a substance have not changed. Chemical reactions involve the breaking and forming of chemical bonds, resulting in a change in the chemical composition of the substances involved.
What symbols indicate that a chemical reaction has occurred?
The sign equql + or an arrow to right.
Why does a change in body temperature indicate that a chemical reaction may have occurred?
Because a disease involve frequently chemical reactions in the organism.
How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
A thermometer can help you determine if there was a chemical change by measuring any temperature change that occurs during the reaction of iron and charcoal. If there is a noticeable increase or decrease in temperature, it could indicate a chemical reaction took place, as chemical reactions often involve the release or absorption of heat energy.
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.
Why does this indicate that a chemical reaction might have occurred?
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 chemiluminiscence
What should not be used to indicate a chemical reaction?
Change of shape can not be used to indicate a chemical reaction has happened. Examples of evidence of a chemical reaction are changes in odor or color.
What in general terms does a chemical equation indicate?
A chemical equation is the representation of a chemical reaction.
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.
