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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
What else can I help you with?
How is a precipitate evidence for a chemical reaction?
A precipitate forms when two aqueous solutions react to produce an insoluble solid. The formation of a precipitate indicates that a chemical reaction has occurred, as the reactants have undergone a change in chemical composition to produce a new substance with different physical properties. This is observable evidence of a chemical change taking place.
If you mix to clear liquids together and bubbles for what type of change would this indicate?
It indicates a chemical reaction because it changes from one substance to another.
Evidence that a chemical change is occurring?
when atoms are combined or taken away and form a different molecule the substance you started with can no longer re-take its original form...example wood to ash from fire or heat, NOT an example is water to steam, that is a physical change and you can condense steam to re-make water.
What sensory evidence could be used to argue that a chemical transformation of a substance had occured?
Change in color, odor, temperature, or form; light , heat or sound given off; formation of gasses that often appear as bubbles, formation of precipitate that often sinks to the bottom, the decomposition of organic matter (food rotting), evident creation of a new substance.
Reacts with acid to form h2 is physical or chemical property?
This is a chemical property. When a substance reacts with an acid to form hydrogen gas, it indicates a chemical change is occurring at a molecular level, resulting in the formation of new substances with different properties.
How do you know that a new substance is formed from the reaction?
A new substance is formed in a chemical reaction if there is a change in properties, such as color, odor, temperature, or formation of a precipitate. Additionally, if the chemical composition of the reactants and products differ, it indicates a new substance has been formed. Chemical tests and analytical techniques can also be used to confirm the presence of a new substance.
What is evidence that a chemical change has happened?
Evidence of a chemical change includes a change in color, formation of a precipitate, evolution of gas bubbles, or a change in temperature. Additionally, if the substance cannot be easily reversed back to its original form, it is likely a chemical change has occurred.
How is a precipitate evidence for a chemical reaction?
A precipitate forms when two aqueous solutions react to produce an insoluble solid. The formation of a precipitate indicates that a chemical reaction has occurred, as the reactants have undergone a change in chemical composition to produce a new substance with different physical properties. This is observable evidence of a chemical change taking place.
What change leads to the formation of a new substance?
Chemical.
How do scientist study evidence for the formation of rodinia?
They use computer models to show how this new evidence supports formation of a supercontinent long before Pangea.
If you mix to clear liquids together and bubbles for what type of change would this indicate?
It indicates a chemical reaction because it changes from one substance to another.
Is powdering of sugar a chemical change?
no because chemical change means formation of a new substance but in powdering no new substance is formed
What is the chartiristic of matter that involes the formation of a new substance?
Radio-isotop
Evidence that a chemical change is occurring?
when atoms are combined or taken away and form a different molecule the substance you started with can no longer re-take its original form...example wood to ash from fire or heat, NOT an example is water to steam, that is a physical change and you can condense steam to re-make water.
Must a new substance be formed when you observe a chemical propery?
The formation of a new substance is the criterion for a chemical change. You can't have a chemical change without the formation of at least one new substance. As you can't observe a chemical property without setting a chemical change in motion, the answer to your question is yes.
What sensory evidence could be used to argue that a chemical transformation of a substance had occured?
Change in color, odor, temperature, or form; light , heat or sound given off; formation of gasses that often appear as bubbles, formation of precipitate that often sinks to the bottom, the decomposition of organic matter (food rotting), evident creation of a new substance.
Reacts with acid to form h2 is physical or chemical property?
This is a chemical property. When a substance reacts with an acid to form hydrogen gas, it indicates a chemical change is occurring at a molecular level, resulting in the formation of new substances with different properties.
