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yes **Why? I need more than just yes. Tell why.** ok ok ok its not always a sign that there is a reaction but in most cases it will be. things that show a reaction are temperature change (usually increase but not always) mass change, state change or physical change. hope this helps
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoA change of color may be a sign that a new compound was obtained.
Wiki User
∙ 9y agoA change in color is an evidence of a chemical change. Other indications of a chemical change include change in odor, temperature, or composition.
Wiki User
∙ 12y agoThe problem statement is true.
Wiki User
∙ 7y agoA change of color is a chemical change.
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Which situation describes evidence of a chemical change?
Changes in Color, size, shape, state of matter and Temperature. Bubbling
What evidence do you have that a chemical reaction took place?
changes in its appearance ie colour and state
What can be evidence of a chemical reaction?
Generally, you know a chemical reaction has occured if there is a change in temperature, a change in color, a formation of a gas (bubbles), or any kind of flame.
How can you be sure that at least one chemical change has occurred?
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
What are 3 things that show evidence of a chemical reaction?
- 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 - formation of new compounds
What are the six types of evidence for a chemical change?
Types of evidence for chemical change include: A gas is evolved. A precipitate appears or disappears. Heat may be evolved or absorbed. A color change occurs. A substance disappears.
Is ther evidence in results that light alone does not change the color of bromo blue solution?
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How can you know this is a chemical reaction?
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
Do all reactions produce visual evidence that they have taken place?
Only reactions that show a change in color, effervescence, and disappearance of one of the reactants provide the visual evidence. Some reactions, such as the reaction between Hydrochloric acid and Sodium Hydroxide, do not provide any visual evidence because there is no change in color of the solution, no effervescence, and no disappearance of a reactant.
Which situation describes evidence of a chemical change?
Changes in Color, size, shape, state of matter and Temperature. Bubbling
What evidence do you have that a chemical reaction took place?
changes in its appearance ie colour and state
What sensory evidence could be used to argue that a chemical transformation of a substance had occurred?
Sensory evidence of chemical reactions may be: - Change of color - Change of odor - Change of aspect - Change of the temperature - A violent reaction with explosion or fire - Bubbling - Emitting a sound - Emitting a light
What results after a chemical change?
A chemical change produces a form of matter that was not there before. Evidence of a chemical change could be changes in temperature, color, smell, and the production of a gas or a precipitate.
What will you see during a chemical change?
Some of the evidence that indicates that a chemical change has occurred include a change in color, the formation of a precipitate from two solutions, gas bubbles, burning, change in temperature.
List 5 pieces of evidence that a chemical change description?
formation of a precipitate formation of a gas color change change in temperature change in odor disappearance of a solid
What can be evidence of a chemical reaction?
Generally, you know a chemical reaction has occured if there is a change in temperature, a change in color, a formation of a gas (bubbles), or any kind of flame.
How can you be sure that at least one chemical change has occurred?
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
