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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.
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.
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.
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.
