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- fizzing
- color change (of course, this exempts artificial coloring)
- odor
- formation of precipitate
- production of gas
- formation of new substance (elemental bonding)
What else can I help you with?
What would not be evidence that a chemical reaction has occurred in a container?
a perfectly claen container
What data will you need to determine whether a chemical reaction occurred?
To determine whether a chemical reaction occurred, you will need data such as changes in temperature, formation of new substances, release of gas, and changes in color or odor.
What kinds of evidence can you use to determine of a chemical reaction has occurred?
fizzingcolor change (of course, this exempts artificial coloring)odorformation of precipitateproduction of gasformation of new substance (elemental bonding)
How can one determine the presence of a precipitate in a chemical reaction?
To determine the presence of a precipitate in a chemical reaction, one can look for the formation of a solid substance that appears cloudy or settles at the bottom of the reaction mixture. This solid substance is called a precipitate and indicates that a chemical reaction has occurred.
If one substance changes color is it a chemical reaction?
Not necessarily. Things sometimes change colors during a chemical reaction, but a color change is not sufficient evidence of a chemical reaction. You can add drink mix to water and the water turns colors, but it is not a chemical reaction, just a mixture.
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 changes gives NO evidence that a chemical reaction has taken place?
Changes such as a change in state (solid to liquid), change in color, change in odor, change in solubility, or change in temperature do not provide direct evidence that a chemical reaction has occurred. These changes can be indicative of a physical change rather than a chemical change. To confirm a chemical reaction, additional evidence such as the formation of new substances, evolution of gas, or consumption of reactants is necessary.
How can you be sure that at least one chemical change has occurred?
You can be sure that a chemical change has occurred if there is a change in color, formation of a precipitate, evolution of gas, or absorption/release of heat during the reaction. These are all indicative of a chemical reaction where the substances are transformed into different compounds with new chemical properties.
What does evidence chemical change mean?
Evidence of a chemical change refers to observable signs that a chemical reaction has occurred. This can include color change, formation of gas or precipitate, temperature change, or production of light. These changes indicate that the substances involved in the reaction have undergone a chemical transformation at the molecular level.
What is the only sure evidence for a chemical reaction?
The only sure evidence for a chemical reaction is the formation of new substances with different properties from the original reactants. This can be observed through changes in color, odor, temperature, or the production of a precipitate or gas.
How can you determine if a chemical reaction has occurred?
A chemical reaction can be determined by observing changes in physical properties, such as color, temperature, gas production, or formation of a precipitate. Additionally, chemical tests or instruments can be used to analyze the substances involved before and after the reaction to confirm a chemical change has taken place.
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.
