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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.
Why does a chemical reaction which have occurred between acids and bases change color?
The change in color in this type of chemical reaction is due to the formation of a new substance with different chemical properties. This new substance may absorb and reflect light differently, leading to a change in color. This phenomenon is often used in indicators to visually show the endpoint of an acid-base reaction.
What are four things that indicate that a chemical change may have taken place?
Change in color: If the substance changes color during a reaction, it may indicate a chemical change. Formation of gas: Production of gas bubbles, fizzing, or bubbling is a sign of a chemical change. Temperature change: Significant heat or cooling effects can indicate a chemical reaction is occurring. Formation of a precipitate: When a solid substance forms in a solution, it suggests a chemical change has taken place.
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
What is a chemical property hardness ability to react with oxygen color or freezing point?
Hardness is a physical property that describes the ability of a substance to resist deformation. Ability to react with oxygen is a chemical property that describes how a substance interacts with oxygen. Color is a physical property that describes the visual appearance of a substance. Freezing point is a physical property that indicates the temperature at which a substance changes from a liquid to a solid.
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 is the definition chemical change?
Chemical ChangesAs opposed to a physical change, chemical changes are present when the substance undergoes a chemical reaction and produces a new substance. A chemical change is a chemical reaction that will always take place for there to be a chemical change. Signs that a reaction is taking place: Formation of gases (bubbles), Color change, production of heat or light, and the formation of a solid. a change in composition and characteristics of matter.new substance maybe formed.original substance and form may be lost.new color and shapeExamplesFermentationPhotosynthesisRusting nailSpoiling milkDigesting food
What happens when color changes?
When color changes on an object or substance, it typically indicates a chemical reaction, a change in temperature, or alteration in the material composition. This change can be permanent or temporary, depending on the underlying cause.
Why is a indicator's reaction in acids and bases a chemical change?
When an indicator is added to an acid or base, it undergoes a chemical reaction with the hydrogen or hydroxide ions present in the solution. This reaction causes a change in the color of the indicator, indicating a shift in the pH of the solution. Since a new substance with different properties is formed during this reaction, it is considered a chemical change.
Is ability to react with other substances chemical or physical?
The ability for a substance to react with other substances is a chemical property, as it involves changes in the substance's chemical composition. Physical properties, on the other hand, relate to characteristics such as color, shape, and state of matter, which do not involve changes in chemical composition.
If a substance changes its color and gives off a gas when heated is it a compound?
Yes, if a substance changes its color and gives off a gas when heated, it is likely a compound undergoing a chemical reaction. The change in color and evolution of gas suggest that new substances are being formed through chemical bonds breaking and forming.
If the color changes it is a chemical or physical?
- Color is a physical property and the change of color also.- Color change may be a sign of a chemical reaction.
How can show what happens in a chemical reactions?
You can show what happens in a chemical reaction by writing a balanced chemical equation that represents the reactants turning into products. Alternatively, you can use diagrams or drawings to illustrate the rearrangement of atoms and bonds during the reaction. Physical changes such as color changes, gas production, or temperature changes can also indicate a chemical reaction is occurring.
Is cornstarch mixed with vinegar a chemical reaction?
Yes, when cornstarch is mixed with vinegar, it undergoes a chemical reaction. The reaction between the two creates a substance known as a suspension, where the cornstarch particles are dispersed in the vinegar, resulting in a thickened mixture.
Does a chemical reaction change physical properties or chemical?
A chemical reaction changes the chemical properties of substances involved by forming new substances with different chemical compositions. This can result in changes in physical properties such as color, temperature, odor, and state of matter.
Why does a chemical reaction which have occurred between acids and bases change color?
The change in color in this type of chemical reaction is due to the formation of a new substance with different chemical properties. This new substance may absorb and reflect light differently, leading to a change in color. This phenomenon is often used in indicators to visually show the endpoint of an acid-base reaction.
What are four things that indicate that a chemical change may have taken place?
Change in color: If the substance changes color during a reaction, it may indicate a chemical change. Formation of gas: Production of gas bubbles, fizzing, or bubbling is a sign of a chemical change. Temperature change: Significant heat or cooling effects can indicate a chemical reaction is occurring. Formation of a precipitate: When a solid substance forms in a solution, it suggests a chemical change has taken place.
